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Two Repeated Elements
Easy Accuracy: 39.91% Submissions: 8512 Points: 2

You are given an array of N+2 integer elements. All elements of the array are in range 1 to N. Also, all elements occur once except two numbers which occur twice. Find the two repeating numbers.

Example 1:

Input:
N = 4
array[] = {1,2,1,3,4,3}
Output: 1 3
Explanation: In the given array, 
1 and 3 are repeated two times.

Example 2:

Input:
N = 2
array[] = {1,2,2,1}
Output: 2 1
Explanation: In the given array,
1 and 2 are repeated two times 
and second occurence of 2 comes 
before 1. So the output is 2 1.

Your Task:
The task is to complete the function repeatedElements() which takes array arr[] and an integer N as inputs (the size of the array is N + 2 and elements are in range[1, N]) and finds the two repeated element in the array and return them in a pair.

Expected Time Complexity: O(N).
Expected Auxiliary Space: O(1). 

Constraints:
2 ≤ N ≤ 105
1 ≤ array[i] ≤ N

 

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Two Repeated Elements

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