Problem: You are given two positive integers n and k. Print the k-th positive integer that is not divisible by n.

For example, if n=3, and k=7, then all numbers that are not divisible by 3 are: 1, 2, 4, 5, 7, 8, 10, 11, 13 .... The 7-th number among them is 10.

Input

The first line contains an integer t (1 ≤ t ≤ 1000) — the number of test cases in the input. Next, t test cases are given, one per line.

Each test case is two positive integers n (2 ≤ n ≤ 10^9) and k (1 ≤ k ≤ 10^9).

Output

For each test case print the k-th positive integer that is not divisible by n.

Example

Input


6
3 7
4 12
2 1000000000
7 97
1000000000 1000000000
2 1


Output


10
15
1999999999
113
1000000001
1

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
const long long int MOD = 1000000007;
const int INF = 1000000007;
const double EPS = 1e-10;
const double PI = 3.14159265359;
const int N = 100005;
int n, t, k;
vector<int> a;
int main() {
  cin >> t;
  while (t--) {
    cin >> n >> k;
    if (k % (n - 1) == 0) {
      cout << n * (k / (n - 1)) - 1 << endl;
    } else {
      cout << n * (k / (n - 1)) + k % (n - 1) << endl;
    }
  }
  return 0;
}