Title Acceptance Level Squares of a Sorted Array 72.1% Easy Move Zeroes 57.8% Easy Happy Number 50.4% Easy Kth Largest Element in a Stream 49.7% Easy Palindrome Linked List 39.3% Easy Generate Parentheses 62.7% Medium Product of Array Except Self 60.1% Medium Group Anagrams 56.9% Medium Grumpy Bookstore Owner 55.4% Medium Check If Word Is Valid After Substitutions 55.3% Medium Task Scheduler 50.1% Medium Implement Trie (Prefix Tree) 49.4% Medium Swap For Longest Repeated Character Substring 49.0% Medium Combination Sum II 48.2% Medium Letter Combinations of a Phone Number 46.8% Medium Number of Islands 46.8% Medium Meeting Rooms II 45.7% Medium Broken Calculator 45.6% Medium Populating Next Right Pointers in Each Node 45.2% Medium Course Schedule 43.1% Medium Course Schedule II 40.7% Medium Most Profit Assigning Work 38.5% Medium Copy List with Random Pointer 36.4% Medium Jump Game 34.6% Medium Search in Rotated Sorted Array 34.5% Medium LRU Cache 33.2% Medium Longest Palindromic Substring 29.5% Medium Circular Array Loop 29.4% Medium Remove K Digits 28.4% Medium Longest Consecutive Sequence 45.1% Hard Sliding Window Maximum 43.0% Hard Frog Jump 39.7% Hard Online Majority Element In Subarray 39.0% Hard Remove Duplicate Letters 35.8% Hard Minimum Window Substring 34.6% Hard Jump Game II 30.6% Hard Integer to English Words 27.1% Hard Find the Closest Palindrome 19.7% Hard