#include <stdlib.h>
#include <stdio.h>


int main(int argc, char **argv)
{
char format[1000];

if(argc !=3)
	{
	fprintf(stderr,"Usage: padnumber num pad\n");
	return -1;
	}

int num=atoi(argv[1]);
int pad=atoi(argv[2]);
sprintf(format,"%%0%dd",pad);
printf(format,num);
return 0;
}