[Leetcode] Longest Common Prefix

最新推荐文章于 2017-12-06 18:33:50 发布

原创最新推荐文章于 2017-12-06 18:33:50 发布 · 632 阅读

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class Solution {
public:
    string longestCommonPrefix(vector<string> &strs) {
        // Start typing your C/C++ solution below
        // DO NOT write int main() function
        string res = "";
        
        if (strs.size() == 0) return res;
        
        res = strs[0];
        for (int i = 1; i < strs.size(); ++i)
        {
            int len = max(strs[i].size(), res.size());
            int j = 0;
            while (j < len)
            {
                if (strs[i][j] != res[j])
                    break;
                ++j;
            }
            
            res.erase(j, res.size() - j);
        }
        
        return res;
    }
};