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# (.NET Core 3.1.201) (judge verdict: Runtime Error)

using System;
using System.Linq;

class Program
{
    public static void Main(string[] args)
    {
        var n = int.Parse(Console.ReadLine());
        var aArray = Console.ReadLine().Split(' ').Select(x => int.Parse(x)).ToArray();

        var ans = 0;

        var prev = 0;
        for (int i = 0; i < aArray.Count(); i++)
        {
            var current = aArray[i];

            var f = current - prev;

            if (f > 0)
            {
                prev = current;
                continue;
            }
            prev = current - f;
            ans += -f;
        }

        Console.WriteLine(ans);
    }
}