necesito un recuadro de 4 lado con marco
#include <iostream> using namespace std; int main() { int n = 10; int m; cin >> m; int a[n][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { cin >> a[i][j]; } } int counter = 0; int maxi = 0; for (int i = 0; i < n; i++) { counter = 0; for (int j = 0; j < n; j++) { if (a[i][j] == 1) { counter++; } } if (counter > maxi) { maxi = counter; } } for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { if (i == 0 || i == n - 1 || j == 0 || j == n