#include <cstdio>
#include <cstdlib>
#include <ctime>
int main()
{
    int n;
    srand(time(NULL));
    freopen(".10.in","w",stdout);
    scanf("%d", &n);
    printf("%d\n", n);
    for(int i = 0 ; i < n ; i++, puts("")) for(int j = 0 ; j < n ; j++ )
        printf("%d ", rand()%20-10);
}