#include<bits/stdc++.h>
using namespace std;
#define int long long
const int N=1e6+10;

signed main()
{
	int t;
	cin>>t;
	while(t--)
	{
		int n,ans=0;
		cin>>n;
		ans=n*(n+1)/2;
		cout<<ans<<'\n';
	}
}