HackerRank "Fair Rations"

Another fun Greedy problem to work on: we simply go from first to second last person, as long someone is odd, we distribute bread to her and her next.

#include <vector>
#include <iostream>

using namespace std;

int main()
{
    int N;
    cin >> N;
    vector<int> B(N);
    for(int B_i = ;B_i < N;B_i++){
       cin >> B[B_i];
    }

    int cnt = ;
    for(int i = ; i < N - ; i ++)
    {
        if(B[i] % )
        {
            B[i] ++;
            B[i+]++;
            cnt += ;
        }
    }

    if(B.back() % )
        cout << "NO" << endl;
    else
        cout << cnt << endl;

    return ;
}