diff --git a/Day01-15/code/Day04/for5.py b/Day01-15/code/Day04/for5.py
index c4ab64e..778c0a5 100644
--- a/Day01-15/code/Day04/for5.py
+++ b/Day01-15/code/Day04/for5.py
@@ -8,8 +8,6 @@ Date: 2018-03-01
 
 x = int(input('x = '))
 y = int(input('y = '))
-if x > y:
-    (x, y) = (y, x)
 for factor in range(x, 0, -1):
     if x % factor == 0 and y % factor == 0:
         print('%d和%d的最大公约数是%d' % (x, y, factor))