Challenges

Rotate Array
You are given an array of N length. You have to rotate the array right...
Max. Marks: 6
Solved By : 368
Floating Number
Bob has a floating point number N. He wants to set the precision for 2...
Max. Marks: 4
Solved By : 4089
SwapMaster solves Symmetric Swap
The SwapMaster is known to be the greatest and fastest swapper of all ...
Max. Marks: 4
Solved By : 3701
String Matching
Cody has a sequence of characters N. He likes a sequence if it contain...
Max. Marks: 3
Solved By : 1925
Leap Year
Steve is playing a quiz game with his brother John. As Steve just lear...
Max. Marks: 6
Solved By : 3027
Project Teams
There are N students in a class and Teacher want to divide these stude...
Max. Marks: 5
Solved By : 3857
Circle of Numbers
All numbers in NumberLand are standing in a circle for a dancing cerem...
Max. Marks: 6
Solved By : 2673
Happy String
A happy string is a string in which each character is lexicographicall...
Max. Marks: 4
Solved By : 1964
Degree Celsius
Tom is a scientist. He uses huge machines for complex calculations. Th...
Max. Marks: 4
Solved By : 4481
Three's Company
This problem requires you to create a output string from input string ...
Max. Marks: 4
Solved By : 2980
Circle of Numbers
Please select a challenge
Problem Statement
All numbers in NumberLand are standing in a circle for a dancing ceremony. Every number needs a dancing partner. Dancing partner of any number is the number which is standing radially opposite to it in the circle. The numbers are from 0 to N-1. A certain number X wants to know who will be its dancing partner. Please help X.

Input
Two positive integers denoting the value of N and X.

Output
Print the number radially opposite to X in a circle of N numbers.

Constraints
4 ≤ N ≤ 20 0 ≤ X < N

Sample Input
8 2

Sample Output

6

Dcoded By: Mrudul Sankhere

Solved By: 2673

Maximum Marks: 6