diff --git a/day01/part2.py b/day01/part2.py
index 6a82be5..48676b0 100644
--- a/day01/part2.py
+++ b/day01/part2.py
@@ -6,9 +6,8 @@ last = [float('inf')] * 3
 cnt = 0
 
 for line in lines:
-    nxt = last[1:] + [line]
-    if sum(last) < sum(nxt):
+    if last[0] < line:
         cnt += 1
-    last = nxt
+    last = last[1:] + [line]
 
 print(cnt)
\ No newline at end of file