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As I have discussed 4 methods to solve the problem, the links to the solution is given below 👇

Method 1 using brute force
Time Complexity : O(n^2)
Space Complexity : O(1)
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Method 2 using Map
Time Complexity : O(n)
Space Complexity : O(n)
----------------------------------------------
Method 3 sorting
Time Complexity : O(nlogn)
Space Complexity : O(1)
-----------------------------------------------
Method 4 Moore's Voting
Time Complexity : O(n)
Space Complexity : O(1)

Problem Link : https://leetcode.com/problems/majorit...
JAVA Code Link : https://leetcode.com/problems/majorit...

Checkout:
LeetCode Single Number :    • LeetCode #136: Single Number | LeetCode Si...  

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