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
Sachin:
20121003 18:42:20
works fine at home but when submiting says wrong answer 

Siddharth Shah:
20121003 15:12:32
brute force exceeds the time limit. Have to go by some other way :( 

sathyanarayanan:
20120718 16:17:42
use brute force...easy problem :P :) Last edit: 20120718 16:18:47 

Fish3R:
20120628 15:42:42
Just analyse the figure... Easy problem.. :D 

sachin tendulkar:
20120627 21:01:21
easy! logic from fig.


marwan akkad:
20120612 15:11:30
I got AC for the first time.


jorsan:
20120531 02:49:25
i have the same problem of Sarwesh Shah,and i dont understand why, please answer Last edit: 20120531 02:50:08 

Mr.[T]:
20120521 19:38:40
running rite in ideone but WA pls help problem id7020369 Last edit: 20120521 19:48:39 

ananyadiwas:
20120516 18:57:58
for the first attempt got accepted..


Archana Anand:
20120512 04:18:32
one of the easiest code in spoj!! 
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 