Problem:
Score : 100 points

Problem Statement

We will buy a product for N yen (the currency of Japan) at a shop.

If we use only 1000-yen bills to pay the price, how much change will we receive?

Assume we use the minimum number of bills required.

Constraints

1 \leq N \leq 10000

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

Print the amount of change as an integer.

Sample Input 1

1900

Sample Output 1

100

We will use two 1000-yen bills to pay the price and receive 100 yen in change.

Sample Input 2

3000

Sample Output 2

0

We can pay the exact price.

Solution in Java (OpenJDK 11.0.6) (judge verdict: Runtime Error)

import java.util.Scanner;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int C1=0,C2=0,C3=0,C4=0;
		for(int i=0;i<n;i++){
			String result = sc.next();
			switch (result){
			case "AC":
				C1+=1;
				break;
			case "WA":
				C2+=1;
				break;
			case "TLE":
				C3+=1;
				break;
			case "RE":
				C4+=1;
				break;
			default:
			}
		}
		System.out.println("AC x "+ String.valueOf(C1));
		System.out.println("WA x "+ String.valueOf(C2));
		System.out.println("TLE x "+ String.valueOf(C3));
		System.out.println("Re x "+ String.valueOf(C4));
	}
}