Longest Common Prefix

题目

给予一个列表,元素为字符串,写一个程序找出最长公共前缀

解题思路

先比较两个字符串,如果第一个字符不一样,则返回空值,比较完成后,用这个公共字符串和下一个元素继续比较,以此类推

class Solution:
# @param {string[]} strs
# @return {string}
def longestCommonPrefix(self, strs):
if not strs:
return ''
if len(strs) == 1:
return strs[0] i = 0
while i+1 < len(strs):
temp = ''
for j in range(min(len(strs[i]), len(strs[i+1]))):
if strs[i][0] != strs[i+1][0]:
return ''
if strs[i][j] == strs[i+1][j]:
temp += strs[i][j]
i += 1
strs[i] = temp
return strs[len(strs)-1]

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