#include <stdio.h>
int main()
{
    int n, i, j, k;
    scanf("%d", &n);
    int mas[n*n+1];
    int res[n+1][n+1];
    for (i = 1; i < n*n+1; i++) {
        scanf("%d", &mas[i]);
    }
    res[1][1] = mas[1];
    res[1][2] = mas[2];
    res[2][2] = mas[3];
    res[2][1] = mas[4];
    int l = 3, d = 5;
    for (i = 3; i < n+1; i++) {
        if (i%2 != 0) {
            for (j = 1; j <= l; j++) {
                res[i][j] = mas[d];
                d++;
            }
            for (j = i-1; j >= 1; j--) {
                res[j][l] = mas[d];
                d++;
            }
            l++;
        }
        else {
            for (j = 1; j <= l-1; j++) {
                res[j][l] = mas[d];
                d++;
            }
            for (j = l; j >= 1; j--) {
                res[i][j] = mas[d];
                d++;
            }
            l++;
        }

    }


    for (i = 1; i < n+1; i++) {
        for (j = 1; j < n+1; j++) {
            printf("%4d ", res[i][j]);
        }
        printf("\n");
    }


}