func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int i, j, w, h;     string temp;     vector<string> img;     cin >> w >> h;     for (i = 0; i < h; i++) {       cin >> temp;       img.push_back(temp);     }     for (j = 0; j < w; j++) {       for (i = 0; i < h; i++) cout << img[i][j] << img[i][j];       cout << endl;       for (i = 0; i < h; i++) cout << img[i][j] << img[i][j];       cout << endl;     }     return 0;   }   