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Problem:
Given an input string, reverse the string word by word.
For example,
Given s = "the sky is blue
",
return "blue is sky the
".
Update (2015-02-12):
For C programmers: Try to solve it in-place in O(1) space.
class Solution(object):
def reverseWords(self, s):
"""
:type s: str
:rtype: str
"""
tmp = s.split()
if len(tmp) == 0: return ""
results = tmp[-1]
for i in range(len(tmp)-2,-1,-1):
results += " "+tmp[i]
return results