Description

Submission

class Solution {
public:
    bool validWordSquare(vector<string>& words) {
        for(int i = 0; i < words.size(); ++i) {
            for(int j = 0; j < words[i].size(); ++j) {
                if(j >= words.size() || words[i][j] != words[j][i]) return false;
            }
        }
        return true;
    }
};