A - Tricky Sum CodeForces - 598A (推公式)

A - Tricky Sum CodeForces - 598A 

In this problem you are to calculate the sum of all integers from 1 to n, but you should take all powers of two with minus in the sum.

For example, for n = 4 the sum is equal to  - 1 - 2 + 3 - 4 =  - 4, because 1, 2 and 4 are 20, 21 and 22 respectively.

Calculate the answer for t values of n.

Input

The first line of the input contains a single integer t (1 ≤ t ≤ 100) — the number of values of n to be processed.

Each of next t lines contains a single integer n (1 ≤ n ≤ 109).

Output

Print the requested sum for each of t integers n given in the input.

Examples

Input

2
4
1000000000

Output

-4
499999998352516354

Note

The answer for the first sample is explained in the statement.

 

题目大意:计算y= 1 - 2 + 3 - 4+5+6+...+i-2^k+.....+n;【1~n中2的k次方为负,其余为+】

可以化为y=1+2+3+.....+n-2*(2^0+2^1+...+2^k)=(1+n)*n/2-2*(2^(k+1)-1);

当时不太记得等比数列前n项和公式,懒得推,直接for求了,反正k很小

#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cstring>
#include <cmath>
#include <string>
#include <queue>
#include <set>
#include <map>
#define loopa(i,a,b,d) for(int i=a;i<b;i+=d)
#define loops(i,a,b,d) for(int i=a;i>b;i-=d)
typedef long long LL;
using namespace std;

int main()
{
    int T;

    scanf("%d",&T);
    while(T--)
    {
        LL n;
        scanf("%lld",&n);
        LL sum=0;
        for(LL i=1;i<=n;i*=2)
        {
            sum+=i;
        }
        sum*=2;
        LL ans=n;
        if(n%2==0)ans=ans/2*(ans+1);
        else ans=(ans+1)/2*ans;
        ans-=sum;
        printf("%lld\n",ans);

    }
    return 0;
}

 

 

 

posted on 2018-07-25 16:15  一零七  阅读(104)  评论(0编辑  收藏  举报

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