ID,Title,Acceptance,Difficulty,Frequency,Leetcode Question Link 130,Surrounded Regions,28.1%,Medium,0.14880377058747696, https://leetcode.com/problems/surrounded-regions 498,Diagonal Traverse,48.2%,Medium,0.09253623916246477, https://leetcode.com/problems/diagonal-traverse 317,Shortest Distance from All Buildings,41.4%,Hard,0.03626870773745257, https://leetcode.com/problems/shortest-distance-from-all-buildings 273,Integer to English Words,27.1%,Hard,0.025767242936146868, https://leetcode.com/problems/integer-to-english-words 622,Design Circular Queue,43.8%,Medium,0.02134552762022309, https://leetcode.com/problems/design-circular-queue 341,Flatten Nested List Iterator,52.9%,Medium,0.019084548692410743, https://leetcode.com/problems/flatten-nested-list-iterator 143,Reorder List,37.1%,Medium,0.01098308679109733, https://leetcode.com/problems/reorder-list 236,Lowest Common Ancestor of a Binary Tree,45.7%,Medium,0.010113582102794063, https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree 238,Product of Array Except Self,60.1%,Medium,0.008434123653610816, https://leetcode.com/problems/product-of-array-except-self 173,Binary Search Tree Iterator,56.6%,Medium,0.008121872057349032, https://leetcode.com/problems/binary-search-tree-iterator 133,Clone Graph,34.8%,Medium,0.007762507443211911, https://leetcode.com/problems/clone-graph 1,Two Sum,45.6%,Easy,0.007050281837628458, https://leetcode.com/problems/two-sum 146,LRU Cache,33.2%,Medium,0.004370636328108912, https://leetcode.com/problems/lru-cache 977,Squares of a Sorted Array,72.1%,Easy,0.003733088796375401, https://leetcode.com/problems/squares-of-a-sorted-array 14,Longest Common Prefix,35.4%,Easy,0.0031776321622032783, https://leetcode.com/problems/longest-common-prefix 200,Number of Islands,46.8%,Medium,0.002765297303115152, https://leetcode.com/problems/number-of-islands 20,Valid Parentheses,39.0%,Easy,0.002197682330605871, https://leetcode.com/problems/valid-parentheses 15,3Sum,26.8%,Medium,0.002081166203824567, https://leetcode.com/problems/3sum