array bounds suck

a3/router.py

@@ -117,8 +117,8 @@ class graph:
         src = connection.src
         dest = connection.dest
         weight = connection.cost
-        this.alist[src - 1][dest] = weight
-        this.alist[dest - 1][src] = weight
+        this.alist[src - 1][dest - 1] = weight
+        this.alist[dest - 1][src - 1] = weight
             
     def rebuild(this):
         this.sssp = [inf] * 5