codeup 1096.c

#include <stdio.h>

int main()
{
    int a[20][20] = { 0 };
    int n, i, j, x, y;
    scanf("%d", &n);
    for (i = 1; i <= n; i++)
    {
        scanf("%d %d", &x, &y);
        a[x][y] = 1;
    }
    for (i = 1; i <= 19; i++)
    {
        for (j = 1; j <= 19; j++)
            printf("%d ", a[i][j]);
        printf("\n");
    }
    return 0;
}