#include <stdio.h>
int main(){
int i,j,n;
scanf("%d",&n);
int num=n*(n+1)/2-n+1;



for(i=n;i>=1;i--){

	for(j=1;j<=i;j++){
		printf("%d ",num);
		num++;
	}
	printf("\n");
}
return 0;
	
}