diff --git a/examples/simpletopology.txt b/examples/simpletopology.txt
new file mode 100644
index 0000000..8e39d06
--- /dev/null
+++ b/examples/simpletopology.txt
@@ -0,0 +1,8 @@
+7   7
+1   3   10000   1   80  120
+2   3   10000   1   110 150
+3   4   1000    1   40  30
+3   5   1000    50  55  50
+4   5   1000    1   10  20
+5   6   10000   1   15  35
+5   7   10000   50  25  45