Educational Codeforces Round 1

Problem - A - Codeforces

void solve()
{
    ios;
    int t;
    cin >> t;
    while(t -- )
    {
        int n;
        cin >> n;
        int sum = n * (n + 1) / 2;
        int temp = 1;
        while(1)
        {
            sum -= temp * 2;
            temp *= 2;
            if(temp > n)
            {
                break;
            }
        }
        cout << sum << "\n";
        
    }
}