#include <stdio.h>
main()
{
	int i,j,num;
	clrscr();
	printf("Enter a number: ");
	scanf("%d",&num);
	for (i=1;i<=num ;i++ )
	{
		for (j=1;j<=i ;j++ )
		{
			printf("%d",j);
		}
	printf("\n");
	}
getch();
}