Problem:
Score: 100 points

Problem Statement

In this problem, a date is written as Y-M-D. For example, 2019-11-30 means November 30, 2019.

Integers M_1, D_1, M_2, and D_2 will be given as input.

It is known that the date 2019-M_2-D_2 follows 2019-M_1-D_1.

Determine whether the date 2019-M_1-D_1 is the last day of a month.

Constraints

Both 2019-M_1-D_1 and 2019-M_2-D_2 are valid dates in the Gregorian calendar.

The date 2019-M_2-D_2 follows 2019-M_1-D_1.

Input

Input is given from Standard Input in the following format:

M_1 D_1
M_2 D_2

Output

If the date 2019-M_1-D_1 is the last day of a month, print 1; otherwise, print 0.

Sample Input 1

11 16
11 17

Sample Output 1

0

November 16 is not the last day of a month.

Sample Input 2

11 30
12 1

Sample Output 2

1

November 30 is the last day of November.

Solution in C (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<stdio.h>

int main(void) {

	int x;
	int mod;
	int a, b, c, d, e, f;

	int tmp;  
	
	scanf("%d", &x);

	for (a = 0; a < x/100 ; a++) {
		for (b = 0; b < x/101; b++) {
			for (c = 0; c < x / 102; c++) {
				for (d = 0; d < x / 103; d++) {
					for (e = 0; e < x / 104; e++) {
						for (f = 0; f < x / 105; f++) {
							tmp = 100*a + 101*b + 102*c + 103*d + 104*e + 105*f;
							if (tmp == x) {
								
								printf("1\n");
								return 0;
							}
						}
					}
				}
			}
		}
	}
	
	printf("0\n");

	return 0;
}