Weird Unsigned substraction 2 full

#include <bits/stdc++.h>
using namespace std;
#define d(x)                cout << #x << " = " << (x) << endl;
#define fr                  freopen("in.txt", "r", stdin);
#define fw                  freopen("out.txt", "w", stdout);
#define mem(x)              memset((x), 0, sizeof((x)));
#define pb                  push_back
#define LL                  long long
#define fastIO              ios_base::sync_with_stdio(false)
#define sf                  scanf
#define pf                  printf
#define sc1(x)              scanf("%d", &x)
#define sc2(x, y)           scanf("%d %d", &x, &y)
#define sc3(x, y, z)        scanf("%d %d %d", &x, &y, &z)
#define FOR(i, x, y)        for(int i=int(x); i<int(y); i++)
#define ROF(i, x, y)        for(int i=int(x-1); i>=int(y); i--)
#define all(c)              c.begin(), c.end()
#define unq(v)              sort(all(v)), (v).erase(unique(all(v)),v.end())
#define siz 1000000

unsigned LL pow_of_two[10000];

int create(){
    unsigned LL i = 0;
    unsigned LL num = 1;
    while(num <= INT_MAX and num >= 0){
        num = pow(2, i);

        pow_of_two[i] = num;

        i++;
    }
}

////////////////problem link: http://codeforces.com/problemset/problem/598/A //////////////////


int main(){
    #ifndef ONLINE_JUDGE
        clock_t tStart = clock();
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
    #endif

    create();

    int tc;
    cin >> tc;

    for(int tr = 1; tr <= tc; tr++){
        unsigned long long n;
        cin >> n;
        unsigned long long int totalSum = (n*(n+1))/2;

        unsigned long long int powerSum = 0;
        for(int i = 0; pow_of_two[i] <= n; i++){
            powerSum += pow_of_two[i];
        }

        //please uncomment and check this line
        //cout << totalSum - powerSum - powerSum << endl;

        long long int ans = totalSum - powerSum - powerSum;
        cout << ans << endl;
    }


    #ifndef ONLINE_JUDGE
        printf("\n>>Time taken: %.10fs\n", (double) (clock() - tStart) / CLOCKS_PER_SEC);
    #endif
}