## NSTEPS - Number Steps

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...10000.

### 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.

### Example

```Input:
3
4 2
6 6
3 4

Output:
6
12
No Number
```

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 < Previous 1 2 3 4 5 6 7 8 9 10 11 Next > sky_scraper: 2018-04-01 15:32:30 i just stored everything in a matrix and answered queries from it :-p at758: 2018-02-04 15:39:53 @manish3749: thanks for the test cases venkat016: 2018-01-11 18:45:28 Thanks to @ajayc1007 and @prasad_235 code2dev: 2017-10-19 17:02:17 check your conditions with other pairs too like (8,12),(12,8) etc your logic might be wrong for some pair.....basic math required. dotty_: 2017-10-09 02:08:42 AC in one go, just basic maths here thanos_tapras: 2017-09-22 19:33:55 AC in one go! Observation of the pattern leads the way to the solution ranger_sim_g: 2017-09-09 15:28:14 AC in one go. Its just two line equations. metahost: 2017-08-26 12:08:07 AC in one! shubham9261: 2017-08-09 16:45:56 y=mx+c just do it by it capt_jatt: 2017-08-05 10:00:49 Last edit: 2017-08-05 10:16:31

 Added by: Camilo Andrés Varela León Date: 2006-11-25 Time limit: 1.159s Source limit: 50000B Memory limit: 1536MB Cluster: Cube (Intel G860) Languages: All except: ERL JS-RHINO NODEJS PERL6 VB.NET Resource: Asia - Tehran 2000