LightOJ 1182 Solution

#include<bits/stdc++.h>
#define ll long long int
using namespace std;
int main()
{
    ll n, t, i = 1;
    cin >> t;
    while(t--)
    {
        cin >> n;

        ll p = __builtin_popcountll(n);

        if(p % 2 == 0)
            cout << "Case " << i++ << ": " << "even" << "\n";
        else if(p%2 == 1)
            cout << "Case " << i++ << ": " << "odd" << "\n";
    }
    return 0;
}