diff --git a/lab5/src/gui/graph.rs b/lab5/src/gui/graph.rs
index eb1b11c..37e2a51 100644
--- a/lab5/src/gui/graph.rs
+++ b/lab5/src/gui/graph.rs
@@ -39,10 +39,10 @@ fn draw_ants(ui: &mut Ui, vertex_locations: &mut [(f32, f32)], data: &GeneticSim
         chromosome.iter().reduce(|a, b| {
             match data.graph.vertices[*a]
                 .iter()
-                .position(|e| data.graph.edges[*e].another(*a) == *b)
+                .find(|e| data.graph.edges[**e].another(*a) == *b)
             {
                 None => unreachable!(),
-                Some(e) => usage[e] += 1,
+                Some(e) => usage[*e] += 1,
             };
             return b;
         });