30 不重复的三位数

0-9可以组成多少不重复三位数

拆分 n = a*100 + 10*b + c   abc

代码如下：

 1 #!/usr/bin/env python
 2 # encoding: utf-8
 3 """
 4 @author: 侠之大者kamil
 5 @file: 30 不重复的三位数.py
 6 @time: 2016/5/23 15:53
 7 """
 8 l = range(4)
 9 cont = 0
10 for a in l[1:]:
11     for b in l:
12         if a == b:continue #过滤a=b
13         for c in l:
14             if c !=a and c !=b:
15                 print(a,b,c)
16                 cont += 1
17 print(‘一共出现：‘,cont)
18
19 def func():
20     pass
21
22
23 if __name__ == ‘__main__‘:
24     pass