Leetcode 14. Longest Common Prefix

Posted 2021-10-26 ximelon

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

class Solution {
public:
    string longestCommonPrefix(vector<string>& strs) {
        if(strs.empty()) return "";
        string ans=strs[0];
        for(int i=0;i<strs[0].size();++i)
            for(int j=1;j<strs.size();++j){
                if(i>=strs[j].size() || strs[j][i]!=ans[i])
                    return string(ans,0,i);
            }
        return ans;
    }
};