diff --git a/01-1-1.py b/01-1-1.py
index e4fd4ba..1fe1ede 100644
--- a/01-1-1.py
+++ b/01-1-1.py
@@ -1,2 +1,2 @@
 l=set(map(int,open("/dev/stdin")))
-print([a*(2020-a) for a in l if 2020-a in l])
+print([a*b for a in l if (b:=2020-a) in l])