Пуфи и Стојче

#include <iostream>

using namespace std;

int main()
{
    int x,y,z;
    cin>>x>>y>>z;
    if((x+y+z)%3==0)
        cout<<0;
    else if((x+y+z)%3==1)
        cout<<2;
    else
        cout<<1;
    return 0;
}