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Matching Pair
Submissions: 86   Accuracy:


  Difficulty: Basic   Marks: 1

Given a set of numbers from 1 to N, each number is exactly present twice so there are N pairs. In the worst-case scenario, how many numbers X should be picked and removed from the set until we find a matching pair?

Example 1:

N = 1
When N=1 Then there is 
one pair and a matching 
pair can be extracted in 
2 Draws.

Example 2:

N = 2
When N=2 then there are 
2 pairs, let them be {1,2,1,2}
and a matching pair will 
be made in 3 draws.

Your Task:
You don't need to read input or print anything. Your task is to complete the function find() which takes an integer N as input parameter and returns an integer, the number of x must be picked and removed from set to find a matching pair.


Expected Time Complexity: O(1)
Expected Space Complexity: O(1)


0 <= N <= 105

** For More Input/Output Examples Use 'Expected Output' option **

Contributor: Siddharth Dungarwal
Author: sd5869

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