#include <bits/stdc++.h> using namespace std; int main(){ int a,b,x,y; cin >> a >> b >> x >> y; switch(a+b+x+y){ case 0: cout << "0"; break; case 1: cout << "1"; break; case 2: cout << "2"; break; case 3: cout << "1"; break; case 4: cout << "0"; break; } }

#include <bits/stdc++.h> using namespace std; int main(){ int a,b,c,d; cin >> a >> b >> c >> d; switch(a+b+c+d){ case 0: cout << "0"; break; case 1: cout << "1"; break; case 2: cout << "2"; break; case 3: cout << "1"; break; case 4: cout << "0"; break; } return 0; }

#include <bits/stdc++.h> using namespace std; int main(){ int a[4],sum=0; for(int i=0;i<4;i++){ cin>>a[i]; sum+=a[i]; } if(sum0 || sum4){ cout<<0; }else if(sum1 || sum3){ cout<<1; }else if(sum==2){ cout<<2; } return 0; }