344 reverse string
344. Reverse String
题目: https://leetcode.com/problems/reverse-string/
难度: Easy
思路：
不要脸的python AC code:
class Solution(object):
def reverseString(self, s):
"""
:type s: str
:rtype: str
"""
return s[::-1]
因为python不支持item assignment
所以如果非要用two pointer来做的话，那么会是这样
class Solution(object):
def reverseString(self, s):
"""
:type s: str
:rtype: str
"""
lst = list(s)
n = len(lst)
start, end = 0, n - 1
while start < end:
lst[end], lst[start] = lst[start],lst[end]
start += 1
end -= 1
return ''.join(lst)
