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# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApplication6
{
    class Program
    {
        static void Main(string[] args)
        {
            int ret=0;
            var s = Console.ReadLine().Split(' ');
            var s2 = Console.ReadLine().Split(' ');
            List<int> dates12=new List<int>(){31,28,31,30,31,30,31,31,30,31,30,31};
            int M1 = int.Parse(s.First());
            int M2 = int.Parse(s2.First());
            int D1 = int.Parse(s.Last());
            int D2 = int.Parse(s2.Last());
            if (M2 - M1 == 1&&D2==1)
            {
                ret = 1;
            }
            Console.WriteLine(ret);
            //Console.ReadLine();

        }
    }
}