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 Python (3.4.3) (judge verdict: Accepted)

# -*- coding: utf-8 -*-
while True:
    N = int(input())
    A = int(input())
    if (N >= 1 and N <= 10000) and (A >= 0 and A <= 1000):
        break

if (N / 500) > 0:
    x = N % 500
    if A >= x:
        print('Yes')
    else:
        print('No')
else:
    if A >= N:
        print('yes')
    else:
        print('No')