Github: https://github.com/BunnyHeist/CSEC
A number spiral is an infinite grid whose upper-left square has number 1. Here are the first five layers of the spiral:
Your task is to find out the number in row y and column x.
Input
The first input line contains an integer t: the number of tests.
After this, there are t lines, each containing integers y and x.
Output
For each test, print the number in row y and column x.
Constraints
1≤t≤105
1≤y,x≤109
Example
Input:
3
2 3
1 1
4 2
Output:
8
1
15
