Grokking Data Structures & Algorithms for Coding Interviews
Ask Author
Back to course home

0% completed

Vote For New Content
Top 'K' Frequent Numbers (medium)
Table of Contents

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible

Problem Statement

Given an unsorted array of numbers, find the top ‘K’ frequently occurring numbers in it.

Example 1:

Input: [1, 3, 5, 12, 11, 12, 11], K = 2
Output: [12, 11]
Explanation: Both '11' and '12' apeared twice.

Example 2:

Input: [5, 12, 11, 3, 11], K = 2
Output: [11, 5] or [11, 12] or [11, 3]
Explanation: Only '11' appeared twice, all other numbers appeared once.

Constraints:

  • 1 <= nums.length <= 10<sup>5</sup>
  • -10<sup>5</sup> <= nums[i] <= 10<sup>5</sup>
  • k is in the range [1, the number of unique elements in the array].
  • It is guaranteed that the answer is unique.

Try it yourself

Try solving this question here:

Python3
Python3
. . . .

.....

.....

.....

Like the course? Get enrolled and start learning!

Table of Contents

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible

Contents are not accessible