diff --git a/src/day01.rs b/src/day01.rs
index 1044af4..6c01225 100644
--- a/src/day01.rs
+++ b/src/day01.rs
@@ -32,11 +32,11 @@ fn part1(left: &Vec<u32>, right: &Vec<u32>) -> u32 {
 }
 
 fn part2(left: &Vec<u32>, right: &Vec<u32>) -> u32 {
-    let mut map = HashMap::new();
+    let mut counter = HashMap::new();
 
     for element in right {
-        *map.entry(*element).or_default() += 1;
+        *counter.entry(*element).or_default() += 1;
     }
 
-    left.iter().map(|v| v * map.get(v).unwrap_or(&0)).sum()
+    left.iter().map(|v| counter.get(v).map(|c| c * v).unwrap_or(0)).sum()
 }