输入一个链表,从尾到头打印链表每个节点的值
java
# -*- coding:utf-8 -*-
class Solution:
# s 源字符串
def replaceSpace(self, s):
# write code here
if s is None:
return None
if len(s) == 0:
return ""
val = []
for ele in s:
if ele != ' ':
val.append(ele)
else:
val.append('%20')
return ''.join(val)