giúp mình vs ạ 

cần rất gấp code c++ ạ

#include <iostream>
#define fi "BOM.INP"
#define fo "BOM.OUT"
using namespace std;
unsigned long long int t, n, k, dem, tam;
int main() 
{
    freopen(fi, "r", stdin);
    freopen(fo, "w", stdout);
    cin >> t;
    while(t--)
    {
        cin >> n >> k;
        while(tam+n <= k)
        {
            dem = 0;
            while(tam+n <= k)
            {
                tam += n;
                dem++;
            }
            k += dem;
        }
        cout << k;
    }
    return 0;
}

$#khanhtaon$

include <iostream>
using namespace std;

int q;

long n,k;

int main()

{

cin>>q;

for(int i=0;i<q;i++)

{


    cin>>n>>k;
    cout<<k+(k-1)/(n-1);

}

return 0;
}