ID,Title,Acceptance,Difficulty,Frequency,Leetcode Question Link 202,Happy Number,50.4%,Easy,2.6221547901764026, https://leetcode.com/problems/happy-number 20,Valid Parentheses,39.0%,Easy,1.3406280912261581, https://leetcode.com/problems/valid-parentheses 1328,Break a Palindrome,43.3%,Medium,0.05910139227591337, https://leetcode.com/problems/break-a-palindrome 121,Best Time to Buy and Sell Stock,50.5%,Easy,0.00846879565300311, https://leetcode.com/problems/best-time-to-buy-and-sell-stock 200,Number of Islands,46.8%,Medium,0.006490251382779317, https://leetcode.com/problems/number-of-islands 31,Next Permutation,32.6%,Medium,0.005989835219179644, https://leetcode.com/problems/next-permutation 215,Kth Largest Element in an Array,55.4%,Medium,0.003902443976931749, https://leetcode.com/problems/kth-largest-element-in-an-array 53,Maximum Subarray,46.5%,Easy,0.002167082872150794, https://leetcode.com/problems/maximum-subarray