Use vertex's individual radius for all relevant calculations

graph.cpp

@@ -72,3 +72,11 @@ void Graph::add_vertex(int x, int y, int r)
     edges.push_back(e);
     current_vertex = v;
 }
+
+
+Vertex::Vertex(int x, int y, int r)
+{
+    this->x = x;
+    this->y = y;
+    this->r = r;
+}