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 JAVA):

Solution:
import java.util.Scanner;

public class JavaApplication137 {

    public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int n = input.nextInt();
for(int i = 0 ; i < n ; i++){

        int a = input.nextInt();
        int b = input.nextInt();
        if(b%(a-1)==0){
             System.out.println(b/(a-1)*a -1);
        }
        else{
            System.out.println(b/(a-1)*a+(b%(a-1)));
        }
        }
    }
    }