#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
 
void triarr_fill(unsigned rows, int **array) {
	unsigned i,j;
	for(i=0;i<rows;i++)
		for(j=0;j<i+1;j++)
			array[i][j]=i-j;
}
 
void triarr_print(unsigned rows, int **array) {
	unsigned i,j;
	for(i=0;i<rows;i++) {
		for(j=0;j<i+1;j++)
			printf("%d ",array[i][j]);
		printf("\n");
	}
}
 
int main(void) {
	unsigned i, nrows;
	scanf("%u",&nrows);
	int **triarray = malloc(sizeof(int*)*nrows);
	for(i=0; i<nrows; i++)
		triarray[i] = malloc(sizeof(int)*(i+1));
	triarr_fill(nrows,triarray);
	triarr_print(nrows,triarray);
	for (i=0; i<nrows; i++) free(triarray[i]);
	free(triarray);
	return 0;
}

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