#include <bits/stdc++.h>
using namespace std;
typedef int64_t ll;
typedef vector<int64_t> vll;

int main() {
    ll n;
    cin>>n;
    vll x(n);
    for(auto &i:x){
        cin>>i;
    }
    ll result=0;
    for(auto &i:x){
        if(i%2==0){
            result++;
        }else{
            result--;
        }
    }
    cout<<result<<endl;
}