Repeat | K5kC

Find two repeating elements in a given ranged array

Single Number 2 - All elements except one occur thrice

Find duplicate number in array containing n+1 numbers between 1 and n

Finding the most frequent element in an array of numbers from 0 to n-1

Find first duplicate number in an array containing numbers from 1 to n

Find duplicates in an array of integers within range 0 to n-1

Majority Element 2 - With n by 3 definition

Majority Element 1

Find most frequent element in the array

Find duplicates in a given array