Problem:
Score: 100 points

Problem Statement

E869120 has A 1-yen coins and infinitely many 500-yen coins.

Determine if he can pay exactly N yen using only these coins.

Constraints

N is an integer between 1 and 10000 (inclusive).

A is an integer between 0 and 1000 (inclusive).

Input

Input is given from Standard Input in the following format:

N
A

Output

If E869120 can pay exactly N yen using only his 1-yen and 500-yen coins, print Yes; otherwise, print No.

Sample Input 1

2018
218

Sample Output 1

Yes

We can pay 2018 yen with four 500-yen coins and 18 1-yen coins, so the answer is Yes.

Sample Input 2

2763
0

Sample Output 2

No

When we have no 1-yen coins, we can only pay a multiple of 500 yen using only 500-yen coins. Since 2763 is not a multiple of 500, we cannot pay this amount.

Sample Input 3

37
514

Sample Output 3

Yes

Solution in C# (Mono 4.6.2.0) (judge verdict: Wrong Answer)

using System;
using System.Linq;

namespace sample
{
	class Program
    {
            static void Main()
        {
            var input = Console.ReadLine();
            var a = Console.ReadLine();
            int N = int.Parse(input);
            int A = int.Parse(a);
            bool flag = false;
            for (int i = 1;i <= A;i++ )
            {
                var Ans = A - i;
                if (Ans % 500 == 0)
                {
                    Console.WriteLine("Yes");
                    flag = true;
                    break;
                }
            }
            if (flag == false)
            {
                Console.WriteLine("No");
            }

        }	
    }
}