剑指offer——2

# -*- coding:utf-8 -*-
class Solution:
    # s 源字符串
    def replaceSpace(self, s):
        # write code here
        n=len(s)
        for i in range(n):
            if s[i]==‘ ‘:
                s=s.replace(s[i],‘%20‘)
        return s
        
while 1:
    try:
        ss=Solution()
        s=raw_input()
        print(ss.replaceSpace(s))
    except:
        break