no while

#include<iostream>
using namespace std;
int main(){
    int a,b,c,d,e,f,g,h;
    cin>>a>>b>>c>>d>>e>>f>>g>>h;
    switch(a+b+c+d+e+f+g+h){
        case 8:cout<<"2";break;
        case 6:cout<<"1";break;
        case 4:cout<<"0";break;
        case 2:cout<<"1";break;
        case 0:cout<<"2";break;
    }
    return 0;
}