diff --git a/day01.py b/day01.py
index c467b46..2d3811a 100644
--- a/day01.py
+++ b/day01.py
@@ -26,7 +26,7 @@ class Day(AOCDay):
 
     def part1(self) -> Any:
         lefts, rights = self.parse_input()
-        return sum(abs(lefts[x] - rights[x]) for x in range(len(lefts)))
+        return sum(abs(l - r) for l, r in zip(lefts, rights))
 
     def part2(self) -> Any:
         lefts, rights = self.parse_input()