填空不会，求教一下。

Question

 

Answer 1

#!/usr/bin/python
# -*- coding: UTF-8 -*-
"""
@author: YangPC
@time:2021/06/21
@QQ:327844761
@微信公众号：ewbang
"""

for a in range(1, 5):
    for b in range(1, 5):
        for c in range(1, 5):
            if a != b and a != c and b != c:
                print("%d%d%d" % (a, b, c), "", end="")

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