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.

 

Illustration



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
Fish3R: 2012-06-28 15:42:42

Just analyse the figure... Easy problem.. :D

sachin tendulkar: 2012-06-27 21:01:21

easy! logic from fig.

marwan akkad: 2012-06-12 15:11:30

I got AC for the first time.
one of the most interesting problem in SPOJ

jorsan: 2012-05-31 02:49:25

i have the same problem of Sarwesh Shah,and i dont understand why, please answer

Last edit: 2012-05-31 02:50:08
Mr.[T]: 2012-05-21 19:38:40

running rite in ideone but WA pls help problem id-7020369

Last edit: 2012-05-21 19:48:39
ananyadiwas: 2012-05-16 18:57:58

for the first attempt got accepted..
one of the easiest program

Archana Anand: 2012-05-12 04:18:32

one of the easiest code in spoj!!

Sarwesh Shah: 2012-04-07 08:19:16

wrote the code and ran it on ideone.com
it ran successfully
dont know wat is the problem....
showing WRONG ANSWER to me

Last edit: 2012-04-07 08:20:35
amit kumar: 2012-03-07 13:05:27

just cncntrte on two lines.........
realy nice.........

CegRahul: 2012-02-12 12:17:58

got AC in first attempt :P


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