Problem 2056 --Number Steps

## 2056: Number Steps

Time Limit: 1 Sec  Memory Limit: 32 MB
Submit: 26  Solved: 15
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## Description

Starting from point (0,0) on a plane, we have written all non-negative integers 0,1,2, ... as shown in the figure. For example, 1, 2, and 3 has been written at points (1,1), (2,0), and (3, 1) respectively and this pattern has continued. You are to write a program that reads the coordinates of a point (x, y), and writes the number (if any) that has been written at that point. (x, y) coordinates in the input are in the range 0...5000.

## Input

The first line of the input is N, the number of test cases for this problem. In each of the N following lines, there is x, and y representing the coordinates (x, y) of a point.

## Output

For each point in the input, write the number written at that point or write No Number if there is none.

## Sample Input

3
1 1
14 12
62 63


## Sample Output

1
26
No Number


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