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 PYTHON3):

Solution:
# https://codeforces.com/problemset/problem/1352/C

import sys

# sys.stdin = open(r"./file/input.txt", 'r')
# sys.stdout = open(r"./file/output.txt", 'w')

t = int(input())

for _ in range(t):
    arr = input().split(" ")
    n = int(arr[0])
    k = int(arr[1])

    print(int(k / (n - 1)) * n  + (-1 if k % (n - 1) == 0 else k % (n - 1)))