#include <stdio.h>

int main(void)
{
	int first_nr;
	int sec_nr;
	char todo;
	
	printf("number 1\n");
	scanf ("%d", first_nr);
	printf("number 2\n");
	scanf ("%d\n",   sec_nr);
	printf("", first_nr - sec_nr);
	return 0;