Friday, August 19, 2016

SPOJ 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.

 
 
 

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
 
 Solution(in python)
  
 
import  sys
T = int(input())
output_list = []
#print Twhile T>0:
    exp = sys.stdin.readline()
    exp = exp.strip("\n")
    num = exp.split(" ")
    x = int(num[0])
    y = int(num[1])
    if(x==y):
        if (x%2==0):
            output_list.append(x+y)
        else:
            output_list.append(x+y-1)
    elif(y == x-2):
        if (x % 2 == 0 and y%2==0):
            output_list.append(x+y)
        else:
            output_list.append(x+y-1)
    else:
        output_list.append('No Number')
    T-=1
for i in range(0,len(output_list)):
    print output_list[i]

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