#include <bits/stdc++.h>
using namespace std;

int main(){
    int N;
    cin >> N;
    vector<int> A(N);
    for (int& x : A) cin >> x;

    int o = count_if(A.begin(), A.end(), [](int x){return abs(x)%2 == 0;});
    int e = count_if(A.begin(), A.end(), [](int x){return abs(x)%2 == 1;});
    cout << abs(o-e) << endl;
}