// Copyright 2021 by cmargery
#include <stdio.h>
#include <stdlib.h>
#define HEIGHT 100
#define WIDTH 100
int input_n();
void input(int **a, int n, int m);
void input_n_m(int *n, int *m);

int main() {
    int n , m;
    input_n_m(&n, &m);
    int **A;
    A=(int**)malloc(n*sizeof(int*));
    for (int i = 0; i < n; ++i)
        A[i] = (int*)malloc(n*sizeof(int));
    input(A, n, n);
    //for (int i = 0; i < n; ++i)
        //free(A[i]);
    //free(A);
return 0;
}

int input_n() {
    char c;
    int n;
    if (scanf("%d%c", &n, &c) == 2 && c == '\n' && n > 0 && n <= 4) {
    } else {
        n = 0;
    }
    return n;
}

void input_n_m(int *n, int *m) {
    char c;
    if (scanf("%d %d%c", n, m, &c) == 3 && c == '\n' && *n > 0 && *m > 0) {
    } else {
        printf("n/a");
    }
}

void input(int **a, int n, int m) {
    for (int i = 0; i < n; ++i) {
        for (int j = 0; j < n; ++i) {
            char c;
            if (scanf("%d%c", a+i+j, &c) != 2 && c != ' ') {
                break;
            } else {
                printf("%d", a[i][j]);
                //continue;
            }
        }
    }
}