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
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puntu:
20150927 08:05:40
two cases. for a number only 2 choices, 1)y==x and 2)y+2==x. for x&y even, ans is (y+x) and for odd ans is (y+x1). 

puntu:
20150927 08:03:56
time limit is too much 

puntu:
20150927 08:03:32
need an 1 ifelse case. nothing more.


Sarvi:
20150926 17:33:52
got WA, didn't put a "\n" after "No Number" :P 

KD :
20150828 18:53:39
AC in 2nd attempt ,got WA because i use NO instead of No 

amous_19291:
20150823 06:33:11
if the range is greater than 10000....thn what shud i print..... 

bittu_94:
20150820 20:53:49
my code is good at pc


Avinash Kumar:
20150722 11:46:34
one line solution after taking inputs :) 

monish007:
20150707 13:10:01
too much WA only for NO NUMBER instead of No Number ..... crazzy Me..


vedaytas:
20150701 14:58:11
very simple question 
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 