diff --git a/day03/part1.py b/day03/part1.py
new file mode 100644
index 0000000..2bf1643
--- /dev/null
+++ b/day03/part1.py
@@ -0,0 +1,3 @@
+import sys
+c=''.join(["01","10"][sum(c)<len(c)/2]for c in zip(*[[c=="1" for c in l]for l in open(sys.argv[3])]))
+print(int(c[1::2],2)*int(c[0::2],2))