using System;

int num = 100;

int count0;

int count1;

int count2;

while(num<=999){

    int unit = num%10;

    int ten = (num%100-unit)/10;

    int hundred = (((num-unit)/10)-ten)/10;

    if((unit+ten +hundred)%3 == 0){

        count0++;

    }

    if((unit+ten +hundred)%3 == 1){

        count1++;

    }

    if((unit+ten +hundred)%3 == 2){

        count2++;

    }

    num++;

}

​

if(count0 < count1 && count0 <count2){

    Console.WriteLine("0");

}

​

else if(count1 < count0 && count1 <count2){

    Console.WriteLine("1");

}

​

else if(count2 < count1 && count2 <count0){

    Console.WriteLine("2");

}else{

    Console.WriteLine("everything is equal");

}

​

​

​