fix 81

src/euler81/src/main.rs

@@ -17,6 +17,7 @@ const FILENAME: &str = "p081_matrix.txt";
 
 fn main() {
     let mut matrix = Matrix::load(Path::new(FILENAME));
+    matrix.set_start((0, 0));
     let mut dijkstra = Dijkstra::new(&mut matrix, AllowedMovements::DownRight, (0, 0));
     dijkstra.solve();
     let result = matrix