Longest Common Prefix问题及解法
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问题描述:
Write a function to find the longest common prefix string amongst an array of strings.
问题分析:
我们只需要从头到尾把每个字符串共同的字符前缀找出即可。
详见代码:
class Solution {public: string longestCommonPrefix(vector<string>& strs) { if(strs.size() == 0 ) return ""; string pre = ""; for(int i = 0; i < strs[0].length(); i++) { char c = strs[0][i]; for(int j = 0; j < strs.size(); j++) { string s = strs[j]; if(s.length() < i + 1 || c != s[i]) return pre;}pre.append(1,c);}return pre; }};
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