#include <stdio.h>
int main() 
{
    int i,j,row;
    scanf("%d",&row);
    printf("Enter the number of rows:%d\n",row);
    for(i=1;i<=row;i++)
        {
            for(j=1;j<=i;j++)
                {
                    printf("%d ",j);
                }
            printf("\n");
        }
    return 0;
}