Problem:
Score : 200 points

Problem Statement

An integer N is a multiple of 9 if and only if the sum of the digits in the decimal representation of N is a multiple of 9.

Determine whether N is a multiple of 9.

Constraints

0 \leq N < 10^{200000}

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If N is a multiple of 9, print Yes; otherwise, print No.

Sample Input 1

123456789

Sample Output 1

Yes

The sum of these digits is 1+2+3+4+5+6+7+8+9=45, which is a multiple of 9, so 123456789 is a multiple of 9.

Sample Input 2

0

Sample Output 2

Yes

Sample Input 3

31415926535897932384626433832795028841971693993751058209749445923078164062862089986280

Sample Output 3

No

Solution in Java (OpenJDK 11.0.6) (judge verdict: Accepted)

import java.util.*;

public class Main {
    
    public static void main(String[] args) {

        Scanner sc = null;
        sc = new Scanner(System.in);
        String n = sc.next();
        sc.close();
        String c = null;
        long sum = 0;
        for (int i=0; i < n.length(); i++) {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        }
        if (sum % 9 == 0 || sum == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

    }
}