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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. int main(){
  4.   ios_base::sync_with_stdio(false);
  5.   cin.tie(NULL);
  6.   int t;
  7.   cin >> t;
  8.   while(t--){
  9.     int n;
  10.     cin >> n;
  11.     if(n>1){
  12.       int par = 0, impar = 0;
  13.       for(int i=2; i < n+1; i++){
  14.         int num ; 
  15.         cin >> num;
  16.         if(i % 2 == 0){
  17.           if(num % 2 != 0){
  18.             impar++;
  19.           }
  20.         }else{
  21.           if(i % 2 == 0){
  22.             par++;
  23.           }
  24.         }
  25.       }
  26.        cout << par << " - " << impar << "\n";
  27.     }else{
  28.       cout << "-1";
  29.     }
  30.   }
  31.  
  32. }
Success #stdin #stdout 0.01s 5320KB
comments (?)
stdin 
4
4
3 2 7 6
3
3 2 6
1
7
7
4 9 2 1 18 3 0
stdout 
0 - 2
0 - 2
0 - 3
0 - 0
https://ideone.com/VRZw3n
language:
C++ (gcc 8.3)
created:
6 days ago
visibility:
public

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