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:
from sys import stdout, stdin
_input, _print = stdin.buffer.readline, stdout.write
_int, _range = int, range
def solution():
    for _ in _range(_int(_input())):
        n, k = [_int(i) for i in _input().split()]
        if k < n:
            print(k)
            continue
        start = k // (n - 1)
        if k % (n - 1) == 0:
            print((start) * n - 1)
        else:
            print((start) * n + k % (n - 1))
solution()