diff --git a/ws2012/CE/Übungen/EiCE_Uebung_00b.pdf b/ws2012/CE/Übungen/EiCE_Uebung_00b.pdf
deleted file mode 100644
index 84387052..00000000
Binary files a/ws2012/CE/Übungen/EiCE_Uebung_00b.pdf and /dev/null differ
diff --git a/ws2012/P2P/Übungen/1/H1_1.graphml b/ws2012/P2P/Übungen/1/H1_1.graphml
deleted file mode 100644
index ecd35f7e..00000000
--- a/ws2012/P2P/Übungen/1/H1_1.graphml
+++ /dev/null
@@ -1,349 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:y="http://www.yworks.com/xml/graphml" xmlns:yed="http://www.yworks.com/xml/yed/3" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://www.yworks.com/xml/schema/graphml/1.1/ygraphml.xsd">
-  <!--Created by yFiles for Java 2.9-->
-  <key for="graphml" id="d0" yfiles.type="resources"/>
-  <key for="port" id="d1" yfiles.type="portgraphics"/>
-  <key for="port" id="d2" yfiles.type="portgeometry"/>
-  <key for="port" id="d3" yfiles.type="portuserdata"/>
-  <key attr.name="url" attr.type="string" for="node" id="d4"/>
-  <key attr.name="description" attr.type="string" for="node" id="d5"/>
-  <key for="node" id="d6" yfiles.type="nodegraphics"/>
-  <key attr.name="Beschreibung" attr.type="string" for="graph" id="d7"/>
-  <key attr.name="url" attr.type="string" for="edge" id="d8"/>
-  <key attr.name="description" attr.type="string" for="edge" id="d9"/>
-  <key for="edge" id="d10" yfiles.type="edgegraphics"/>
-  <graph edgedefault="directed" id="G">
-    <data key="d7"/>
-    <node id="n0">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="44.0" width="52.0" x="104.125" y="0.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="16.76171875" x="17.619140625" y="12.93359375">"."<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <node id="n1">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="44.0" width="52.0" x="36.0" y="84.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="18.23828125" x="16.880859375" y="12.93359375">de<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <node id="n2">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="44.0" width="52.0" x="172.25" y="84.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="23.763671875" x="14.1181640625" y="12.93359375">org<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <node id="n3">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="39.0" width="93.0" x="15.5" y="168.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="82.4453125" x="5.27734375" y="10.43359375">tu-darmstadt<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <node id="n4">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="44.0" width="52.0" x="128.5" y="168.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="26.376953125" x="12.8115234375" y="12.93359375">gnu<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <node id="n5">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="44.0" width="83.0" x="200.5" y="168.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="59.083984375" x="11.9580078125" y="12.93359375">wikipedia<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <node id="n6">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="44.0" width="83.0" x="20.5" y="247.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="64.41015625" x="9.294921875" y="12.93359375">informatik<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <node id="n7">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="44.0" width="52.0" x="128.5" y="252.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="27.66015625" x="12.169921875" y="12.93359375">lists<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <node id="n8">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="44.0" width="52.0" x="216.0" y="252.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="18.23828125" x="16.880859375" y="12.93359375">de<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <node id="n9">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="44.0" width="52.0" x="72.0" y="331.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="15.501953125" x="18.2490234375" y="12.93359375">tk<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <node id="n10">
-      <data key="d4"/>
-      <data key="d5"/>
-      <data key="d6">
-        <y:GenericNode configuration="BevelNode3">
-          <y:Geometry height="44.0" width="52.0" x="0.0" y="331.0"/>
-          <y:Fill color="#FFFFFF" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="26.693359375" x="12.6533203125" y="12.93359375">p2p<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-        </y:GenericNode>
-      </data>
-    </node>
-    <edge id="e0" source="n0" target="n1">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="none"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-12.59425426664805" y="17.9951171875"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e1" source="n0" target="n2">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="none"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="19.83830188569567" y="17.9951171875"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e2" source="n1" target="n3">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="none"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="2.0" y="17.993408203125"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e3" source="n3" target="n6">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="none"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="2.0" y="17.960693359375"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e4" source="n6" target="n10">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="none"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-5.703404017857146" y="17.974609375"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e5" source="n6" target="n9">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="none"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="11.417689732142847" y="17.974609375"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e6" source="n2" target="n4">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="none"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-7.361775716145843" y="17.974609375"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e7" source="n2" target="n5">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="none"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="13.445109049479157" y="17.974609375"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e8" source="n4" target="n7">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="none"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="2.0" y="17.974609375"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e9" source="n5" target="n8">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="none"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="2.0" y="17.974609375"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-  </graph>
-  <data key="d0">
-    <y:Resources/>
-  </data>
-</graphml>
diff --git a/ws2012/P2P/Übungen/1/H1_1.jpg b/ws2012/P2P/Übungen/1/H1_1.jpg
deleted file mode 100644
index 073cc12d..00000000
Binary files a/ws2012/P2P/Übungen/1/H1_1.jpg and /dev/null differ
diff --git a/ws2012/P2P/Übungen/1/H1_3.graphml b/ws2012/P2P/Übungen/1/H1_3.graphml
deleted file mode 100644
index cb57f509..00000000
--- a/ws2012/P2P/Übungen/1/H1_3.graphml
+++ /dev/null
@@ -1,385 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:y="http://www.yworks.com/xml/graphml" xmlns:yed="http://www.yworks.com/xml/yed/3" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://www.yworks.com/xml/schema/graphml/1.1/ygraphml.xsd">
-  <!--Created by yFiles for Java 2.9-->
-  <key for="graphml" id="d0" yfiles.type="resources"/>
-  <key for="port" id="d1" yfiles.type="portgraphics"/>
-  <key for="port" id="d2" yfiles.type="portgeometry"/>
-  <key for="port" id="d3" yfiles.type="portuserdata"/>
-  <key attr.name="url" attr.type="string" for="node" id="d4"/>
-  <key attr.name="description" attr.type="string" for="node" id="d5"/>
-  <key for="node" id="d6" yfiles.type="nodegraphics"/>
-  <key attr.name="Beschreibung" attr.type="string" for="graph" id="d7"/>
-  <key attr.name="url" attr.type="string" for="edge" id="d8"/>
-  <key attr.name="description" attr.type="string" for="edge" id="d9"/>
-  <key for="edge" id="d10" yfiles.type="edgegraphics"/>
-  <graph edgedefault="directed" id="G">
-    <data key="d7"/>
-    <node id="n0">
-      <data key="d5"/>
-      <data key="d6">
-        <y:ShapeNode>
-          <y:Geometry height="71.0" width="65.0" x="372.35619212962956" y="-1.999999999999993"/>
-          <y:Fill hasColor="false" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="32.37109375" x="16.314453125" y="26.43359375">GDI I<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-          <y:Shape type="ellipse"/>
-        </y:ShapeNode>
-      </data>
-    </node>
-    <node id="n1">
-      <data key="d5"/>
-      <data key="d6">
-        <y:ShapeNode>
-          <y:Geometry height="71.0" width="65.0" x="107.0" y="187.5"/>
-          <y:Fill hasColor="false" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="27.630859375" x="18.6845703125" y="26.43359375">NCS<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-          <y:Shape type="ellipse"/>
-        </y:ShapeNode>
-      </data>
-    </node>
-    <node id="n2">
-      <data key="d5"/>
-      <data key="d6">
-        <y:ShapeNode>
-          <y:Geometry height="71.0" width="65.0" x="372.35619212962956" y="187.5"/>
-          <y:Fill hasColor="false" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="35.828125" x="14.5859375" y="26.43359375">GDI II<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-          <y:Shape type="ellipse"/>
-        </y:ShapeNode>
-      </data>
-    </node>
-    <node id="n3">
-      <data key="d5"/>
-      <data key="d6">
-        <y:ShapeNode>
-          <y:Geometry height="71.0" width="65.0" x="521.9956597222222" y="187.5"/>
-          <y:Fill hasColor="false" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="39.28515625" x="12.857421875" y="26.43359375">GDI III<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-          <y:Shape type="ellipse"/>
-        </y:ShapeNode>
-      </data>
-    </node>
-    <node id="n4">
-      <data key="d5"/>
-      <data key="d6">
-        <y:ShapeNode>
-          <y:Geometry height="71.0" width="65.0" x="107.0" y="323.6846064814815"/>
-          <y:Fill hasColor="false" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="24.853515625" x="20.0732421875" y="26.43359375">P2P<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-          <y:Shape type="ellipse"/>
-        </y:ShapeNode>
-      </data>
-    </node>
-    <node id="n5">
-      <data key="d5"/>
-      <data key="d6">
-        <y:ShapeNode>
-          <y:Geometry height="71.0" width="65.0" x="740.4956597222222" y="153.75"/>
-          <y:Fill hasColor="false" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="29.1015625" x="17.94921875" y="26.43359375">CMS<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-          <y:Shape type="ellipse"/>
-        </y:ShapeNode>
-      </data>
-    </node>
-    <node id="n6">
-      <data key="d5"/>
-      <data key="d6">
-        <y:ShapeNode>
-          <y:Geometry height="71.0" width="74.04224537037044" x="636.4534143518517" y="237.19299768518522"/>
-          <y:Fill hasColor="false" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="64.216796875" x="4.912724247685219" y="26.43359375">Compiler I<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-          <y:Shape type="ellipse"/>
-        </y:ShapeNode>
-      </data>
-    </node>
-    <node id="n7">
-      <data key="d5"/>
-      <data key="d6">
-        <y:ShapeNode>
-          <y:Geometry height="77.0" width="96.0" x="224.1780960648148" y="323.6846064814815"/>
-          <y:Fill hasColor="false" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="84.830078125" x="5.5849609375" y="29.43359375">Semantic Web<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-          <y:Shape type="ellipse"/>
-        </y:ShapeNode>
-      </data>
-    </node>
-    <node id="n8">
-      <data key="d5"/>
-      <data key="d6">
-        <y:ShapeNode>
-          <y:Geometry height="71.0" width="65.0" x="239.67809606481478" y="187.5"/>
-          <y:Fill hasColor="false" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="27.326171875" x="18.8369140625" y="26.43359375">DKE<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-          <y:Shape type="ellipse"/>
-        </y:ShapeNode>
-      </data>
-    </node>
-    <node id="n9">
-      <data key="d5"/>
-      <data key="d6">
-        <y:ShapeNode>
-          <y:Geometry height="71.0" width="65.0" x="656.4027777777777" y="-1.999999999999993"/>
-          <y:Fill hasColor="false" transparent="false"/>
-          <y:BorderStyle color="#000000" type="line" width="1.0"/>
-          <y:NodeLabel alignment="center" autoSizePolicy="content" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" height="18.1328125" modelName="custom" textColor="#000000" visible="true" width="32.705078125" x="16.1474609375" y="26.43359375">TGDI<y:LabelModel>
-              <y:SmartNodeLabelModel distance="4.0"/>
-            </y:LabelModel>
-            <y:ModelParameter>
-              <y:SmartNodeLabelModelParameter labelRatioX="0.0" labelRatioY="0.0" nodeRatioX="0.0" nodeRatioY="0.0" offsetX="0.0" offsetY="0.0" upX="0.0" upY="-1.0"/>
-            </y:ModelParameter>
-          </y:NodeLabel>
-          <y:Shape type="ellipse"/>
-        </y:ShapeNode>
-      </data>
-    </node>
-    <edge id="e0" source="n0" target="n3">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="57.1717687148473" y="65.86827850341797"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e1" source="n0" target="n2">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="1.9999909577545623" y="57.25"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e2" source="n2" target="n3">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="40.31972475405087" y="2.0"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e3" source="n3" target="n6">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="24.872364185474453" y="14.05888494807462"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e4" source="n9" target="n5">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="28.616404449533547" y="45.29674530029297"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e5" source="n5" target="n6">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-23.71930609809033" y="21.887325064124497"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e6" source="n9" target="n6">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-3.3009924915382953" y="82.18428265606917"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e7" source="n0" target="n8">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-43.19544389587361" y="64.55126953125"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e8" source="n0" target="n1">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-107.47583459924772" y="78.7521863015738"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e9" source="n1" target="n4">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="2.0" y="30.592303240740762"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e10" source="n8" target="n7">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="1.9999954788772811" y="30.592303240740762"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e11" source="n0" target="n6">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="104.85832496925627" y="98.93361020022985"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e12" source="n0" target="n5">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="0.0" sy="0.0" tx="0.0" ty="0.0"/>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="151.76354189272274" y="67.8994113297545"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-    <edge id="e13" source="n6" target="n3">
-      <data key="d8"/>
-      <data key="d9"><![CDATA[UMLimplements]]></data>
-      <data key="d10">
-        <y:PolyLineEdge>
-          <y:Path sx="-36.404610339506235" sy="5.509548611110972" tx="0.0" ty="0.0">
-            <y:Point x="600.9009452160492" y="257.40538194444434"/>
-          </y:Path>
-          <y:LineStyle color="#000000" type="line" width="1.0"/>
-          <y:Arrows source="none" target="delta"/>
-          <y:EdgeLabel alignment="center" distance="2.0" fontFamily="Dialog" fontSize="12" fontStyle="plain" hasBackgroundColor="false" hasLineColor="false" hasText="false" height="4.0" modelName="six_pos" modelPosition="tail" preferredPlacement="anywhere" ratio="0.5" textColor="#000000" visible="true" width="4.0" x="-24.778630762924536" y="-9.94770334502806"/>
-          <y:BendStyle smoothed="false"/>
-        </y:PolyLineEdge>
-      </data>
-    </edge>
-  </graph>
-  <data key="d0">
-    <y:Resources/>
-  </data>
-</graphml>
diff --git a/ws2012/P2P/Übungen/1/H1_3.jpg b/ws2012/P2P/Übungen/1/H1_3.jpg
deleted file mode 100644
index 9aff6076..00000000
Binary files a/ws2012/P2P/Übungen/1/H1_3.jpg and /dev/null differ
diff --git a/ws2012/P2P/Übungen/1/exercise1.pdf b/ws2012/P2P/Übungen/1/exercise1.pdf
deleted file mode 100644
index 91e2a5a2..00000000
Binary files a/ws2012/P2P/Übungen/1/exercise1.pdf and /dev/null differ
diff --git a/ws2012/P2P/Übungen/1/exercise1_solution.odt b/ws2012/P2P/Übungen/1/exercise1_solution.odt
deleted file mode 100644
index 835770b6..00000000
Binary files a/ws2012/P2P/Übungen/1/exercise1_solution.odt and /dev/null differ
diff --git a/ws2012/P2P/Übungen/1/exercise1_solution.pdf b/ws2012/P2P/Übungen/1/exercise1_solution.pdf
deleted file mode 100644
index 99333465..00000000
Binary files a/ws2012/P2P/Übungen/1/exercise1_solution.pdf and /dev/null differ