#include <stdio.h>

int main() {
	int i,j,n;
	scanf("%d",&n);
	for(i=1;i<=n;i++){
		for(j=n-i+1;j<=n;j++){
			printf("%d ",j);
		}
		
		for(j=n-1;j>=n-i+1;j--){
			printf("%d ",j);
		}
		printf("\n");
	}
	return 0;
}