View Code of Problem 3941

#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main()
{
	int t;
	cin>>t;
	while(t--)
	{
		vector<long long> a;
		long long l,p,q;
		cin>>l;
		p=l;q=-1;
		while(1)
		{
			q++;
			long long m=l*(l+1);
			std::vector<long long>::iterator it;
			it = find(a.begin(), a.end(), m/2);
			if(it!=a.end()){
				break;
			} 
			a.push_back(m);
			l++;
		}
		cout<<p+q<<endl;
	}  
}