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 C++ (GCC 9.2.1) (judge verdict: Wrong Answer)

#include <bits/stdc++.h>
using namespace std;

void solve()
{
    int n;
    cin >> n;
    int sum = 0;
    if (n < 0)
    {
        n *= -1;
    }
    while (n > 0)
    {
        sum += n % 10;
        n /= 10;
    }
    cout << ((sum % 9 == 0) ? "Yes" : "No");
}
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    solve();
    return 0;
}