Challenges

SwapMaster solves Symmetric Swap
The SwapMaster is known to be the greatest and fastest swapper of all ...
Max. Marks: 4
Solved By : 1957
String Matching
Cody has a sequence of characters N. He likes a sequence if it contain...
Max. Marks: 3
Solved By : 914
Leap Year
Steve is playing a quiz game with his brother John. As Steve just lear...
Max. Marks: 6
Solved By : 1565
Project Teams
There are N students in a class and Teacher want to divide these stude...
Max. Marks: 5
Solved By : 2709
Circle of Numbers
All numbers in NumberLand are standing in a circle for a dancing cerem...
Max. Marks: 6
Solved By : 1923
Happy String
A happy string is a string in which each character is lexicographicall...
Max. Marks: 4
Solved By : 1373
Degree Celsius
Tom is a scientist. He uses huge machines for complex calculations. Th...
Max. Marks: 4
Solved By : 3208
Three's Company
This problem requires you to create a output string from input string ...
Max. Marks: 4
Solved By : 2252
Array Sum
You are given an integer array and you have to find the sum of the ele...
Max. Marks: 4
Solved By : 2154
Change in Case
You will be given a single string and two positive integers denoting i...
Max. Marks: 6
Solved By : 1188
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: 1923

Maximum Marks: 6