NSTEPS  Number Steps
Starting from point (0,0) on a plane, we have written all nonnegative 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
hide comments
at758:
20180204 15:39:53
@manish3749: thanks for the test cases 

venkat016:
20180111 18:45:28
Thanks to @ajayc1007 and @prasad_235 

code2dev:
20171019 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_:
20171009 02:08:42
AC in one go, just basic maths here 

thanos_tapras:
20170922 19:33:55
AC in one go!


ranger_sim_g:
20170909 15:28:14
AC in one go. Its just two line equations. 

metahost:
20170826 12:08:07
AC in one! 

shubham9261:
20170809 16:45:56
y=mx+c


capt_jatt:
20170805 10:00:49
Last edit: 20170805 10:16:31 

manish_nit97:
20170628 20:47:45
Accepted in one GO!! (for those who don't know the meaning of AC in 1 GO ;b)

Added by:  Camilo Andrés Varela León 
Date:  20061125 
Time limit:  1.159s 
Source limit:  50000B 
Memory limit:  1536MB 
Cluster:  Cube (Intel G860) 
Languages:  All except: ERL JSRHINO NODEJS PERL6 VB.NET 
Resource:  Asia  Tehran 2000 