LeetCode: 14. Longest Common Prefix

https://leetcode.com/problems/longest-common-prefix/

14. Longest Common Prefix

Write a function to find the longest common prefix string amongst an array of strings.

解题要点

1. 注意题中要求的是前缀

code

class Solution {
public:
    string longestCommonPrefix(vector<string>& strs) {
        if (strs.empty()) return string();
        for(int i = 0; i < strs[0].size(); ++i)
        {
            for(int j = 0; j < strs.size(); ++j)
            {
                if (strs[j][i] != strs[0][i])
                    return strs[0].substr(0, i);
            }
        }
        return strs[0];
    }
};