#include <stdio.h>

int main(void) {
int i = 0; // increments the number
int j = 0; // increments the spaces
int userNum = 3; // holds the number value

   for(i = 0; i <=userNum ; ++i) // increase the number till we hit the usernum limit
    {

        for(j = 0 ; j <= i; ++j) // increase the spaces till we hit the usernum limit
        {
            printf(" ");
        }
        printf("%d", i);
        printf("\n");
    }

	return 0;
}