C_4_4;4_7

#include <stdio.h>

int main()
{
    int n;
    scanf("%d", &n);
    if (n >= 1 && n <= 9)
    {
        int k = 1, len = 1;
        for (int i = 0; i < n; i++) {
            for (int j = 0; j < len; j++) {
                printf("%d", k);
                if (j < len - 1)
                    printf(" ");
                k++;
            }
            k = 1;
            len++;
            if (i < n)
                printf("\n");
        }
    }
    else
        printf("N is wrong %d", n);
    return 0;
}