diff --git a/doc/Flowchart1.drawio b/doc/Flowchart1.drawio
new file mode 100644
index 0000000..5cb3f24
--- /dev/null
+++ b/doc/Flowchart1.drawio
@@ -0,0 +1,46 @@
+<mxfile host="Electron" agent="Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/24.7.17 Chrome/128.0.6613.186 Electron/32.2.7 Safari/537.36" version="24.7.17" pages="2">
+  <diagram id="C5RBs43oDa-KdzZeNtuy" name="Page-1">
+    <mxGraphModel dx="1660" dy="843" grid="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="827" pageHeight="1169" math="0" shadow="0">
+      <root>
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-0" />
+        <mxCell id="WIyWlLk6GJQsqaUBKTNV-1" parent="WIyWlLk6GJQsqaUBKTNV-0" />
+        <mxCell id="h8zDR5j_nEeJmlsioyJr-3" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" parent="WIyWlLk6GJQsqaUBKTNV-1" source="h8zDR5j_nEeJmlsioyJr-1" target="h8zDR5j_nEeJmlsioyJr-4" edge="1">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="354" y="280" as="targetPoint" />
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="h8zDR5j_nEeJmlsioyJr-1" value="interactive user interface to add:&lt;div&gt;subjects,deadlines, priorities&lt;/div&gt;" style="rounded=1;whiteSpace=wrap;html=1;" parent="WIyWlLk6GJQsqaUBKTNV-1" vertex="1">
+          <mxGeometry x="294" y="50" width="120" height="60" as="geometry" />
+        </mxCell>
+        <mxCell id="h8zDR5j_nEeJmlsioyJr-5" value="" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;" parent="WIyWlLk6GJQsqaUBKTNV-1" source="h8zDR5j_nEeJmlsioyJr-4" target="h8zDR5j_nEeJmlsioyJr-6" edge="1">
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+        <mxCell id="9LKb6hFhdukI4IS8_kV4-1" style="edgeStyle=orthogonalEdgeStyle;rounded=0;orthogonalLoop=1;jettySize=auto;html=1;entryX=1;entryY=0.5;entryDx=0;entryDy=0;" parent="WIyWlLk6GJQsqaUBKTNV-1" source="h8zDR5j_nEeJmlsioyJr-4" target="h8zDR5j_nEeJmlsioyJr-1" edge="1">
+          <mxGeometry relative="1" as="geometry">
+            <mxPoint x="520" y="70" as="targetPoint" />
+            <Array as="points">
+              <mxPoint x="500" y="315" />
+              <mxPoint x="500" y="80" />
+            </Array>
+          </mxGeometry>
+        </mxCell>
+        <mxCell id="h8zDR5j_nEeJmlsioyJr-4" value="use cake-cutting algorithm to generate study plan&lt;div&gt;with breaks&lt;/div&gt;" style="rounded=1;whiteSpace=wrap;html=1;" parent="WIyWlLk6GJQsqaUBKTNV-1" vertex="1">
+          <mxGeometry x="266" y="250" width="176" height="130" as="geometry" />
+        </mxCell>
+        <mxCell id="h8zDR5j_nEeJmlsioyJr-6" value="output as iCal" style="rounded=1;whiteSpace=wrap;html=1;" parent="WIyWlLk6GJQsqaUBKTNV-1" vertex="1">
+          <mxGeometry x="294" y="490" width="120" height="60" as="geometry" />
+        </mxCell>
+      </root>
+    </mxGraphModel>
+  </diagram>
+  <diagram id="hhLM80gejV0DpMq_GB9E" name="Page-2">
+    <mxGraphModel grid="1" page="1" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
+      <root>
+        <mxCell id="0" />
+        <mxCell id="1" parent="0" />
+      </root>
+    </mxGraphModel>
+  </diagram>
+</mxfile>
diff --git a/doc/Flowchart1.pdf b/doc/Flowchart1.pdf
new file mode 100644
index 0000000..ffd44c1
Binary files /dev/null and b/doc/Flowchart1.pdf differ
diff --git a/doc/docu.md b/doc/docu.md
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index 0000000..ee56ad4
--- /dev/null
+++ b/doc/docu.md
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+# Data strucures
+
+?
+```C
+typedef struct Subject{
+  char * name;
+  time_t * created;
+  time_t * deadline;
+  int priority;
+} Subject;
+
+typedef struct Event {
+  Subject * subject;
+  time_t plannedStartTime;
+  time_t plannedEndTime;
+  bool done;
+}Event;
+
+typedef struct DayPlan{
+  int availableTime;
+  time_t date;
+  Event * plan;
+}DayPlan;
+```