ID,Title,Acceptance,Difficulty,Frequency,Leetcode Question Link 227,Basic Calculator II,36.9%,Medium,0.10614463594818956, https://leetcode.com/problems/basic-calculator-ii 43,Multiply Strings,33.9%,Medium,0.07944184170158367, https://leetcode.com/problems/multiply-strings 721,Accounts Merge,48.8%,Medium,0.07349495575336484, https://leetcode.com/problems/accounts-merge 556,Next Greater Element III,31.7%,Medium,0.04679216150675895, https://leetcode.com/problems/next-greater-element-iii 727,Minimum Window Subsequence,41.8%,Hard,0.04237922296886145, https://leetcode.com/problems/minimum-window-subsequence 304,Range Sum Query 2D - Immutable,38.6%,Medium,0.031036973995576488, https://leetcode.com/problems/range-sum-query-2d-immutable 218,The Skyline Problem,34.6%,Hard,0.025479085300984906, https://leetcode.com/problems/the-skyline-problem 698,Partition to K Equal Sum Subsets,45.0%,Medium,0.02109782896463587, https://leetcode.com/problems/partition-to-k-equal-sum-subsets 301,Remove Invalid Parentheses,43.3%,Hard,0.01446679841775339, https://leetcode.com/problems/remove-invalid-parentheses 120,Triangle,44.2%,Medium,0.013236460625830901, https://leetcode.com/problems/triangle 200,Number of Islands,46.8%,Medium,0.011509262420590827, https://leetcode.com/problems/number-of-islands 48,Rotate Image,56.7%,Medium,0.011428695823622754, https://leetcode.com/problems/rotate-image 212,Word Search II,34.9%,Hard,0.009845021678804893, https://leetcode.com/problems/word-search-ii 10,Regular Expression Matching,26.8%,Hard,0.0071865203293987245, https://leetcode.com/problems/regular-expression-matching 31,Next Permutation,32.6%,Medium,0.005989835219179644, https://leetcode.com/problems/next-permutation 4,Median of Two Sorted Arrays,29.6%,Hard,0.003900160950094767, https://leetcode.com/problems/median-of-two-sorted-arrays