You are coding as a Guest. Sign in with your RoleNest account to permanently track your streak, earn XP, and climb the Campus Leaderboard!
Sign In with RoleNestProblem Set
🔥Top K Frequent Elements: Trending AnalyticsMedium
MediumArrays & Hashing•Acceptance: 62.8%
Top K Frequent Elements: Trending Analytics
Real-World Engineering Context
Powers real-time trending hashtags on Twitter/X, popular product counters on Amazon, and hot cache identification at Cloudflare.
Given an integer array `nums` and an integer `k`, return the `k` most frequent elements in descending order of frequency. If frequencies match, return any valid order.
Sample Test Cases
Input: [[1,1,1,2,2,3],2]
Expected: [1,2]
Input: [[1],1]
Expected: [1]
Constraints
- 1 <= nums.length <= 10^5
- -10^4 <= nums[i] <= 10^4
- k is in the range [1, the number of unique elements in the array].
Language:
Ready to test. Click Run Code or Submit Solution to run test cases in isolated browser sandbox.