#include<bits/stdc++.h>
using namespace std;
int main(){
   int n;
   cin>>n;
   vector<int>a(n),b(n);
   int x=0,y=0;
   for(int i=0;i<n;i++){
       cin>>a[i]>>b[i];
       if(a[i]==1&&b[i]==1){
            x++;
       }
       if(a[i]==-1 && b[i]==-1){
            y++;
       }
    }
    cout<<x<<" "<<y<<endl;
}

if input is
2
-1 -1
0 0
why is output not 0 0?I can’t understand what is happening help me please.