| 851 | Loud and Rich | Medium | 1783 | arraydepth-first-searchgraph+1 |
| 852 | Peak Index in a Mountain Array | Medium | 1176 | arraybinary-search |
| 853 | Car Fleet | Medium | 1740 | arraymathstack+2 |
| 855 | Exam Room | Medium | 2067 | designheap-priority-queueordered-set |
| 858 | Mirror Reflection | Medium | 1881 | mathgeometrynumber-theory |
| 875 | Koko Eating Bananas | Medium | 1765 | arraybinary-search |
| 877 | Stone Game | Medium | 1590 | arraymathdynamic-programming+1 |
| 881 | Boats to Save People | Medium | 1530 | arraytwo-pointersgreedy+1 |
| 886 | Possible Bipartition | Medium | 1795 | depth-first-searchbreadth-first-searchunion-find+1 |
| 894 | All Possible Full Binary Trees | Medium | 1784 | dynamic-programmingtreerecursion+2 |
| 900 | RLE Iterator | Medium | 1532 | arraydesigncounting+1 |
| 901 | Online Stock Span | Medium | 1708 | stackdesignmonotonic-stack+1 |
| 904 | Fruit Into Baskets | Medium | 1709 | arrayhash-tablesliding-window |
| 907 | Sum of Subarray Minimums | Medium | 1823 | arraydynamic-programmingstack+1 |
| 909 | Snakes and Ladders | Medium | 1962 | arraybreadth-first-searchmatrix |
| 912 | Sort an Array | Medium | — | arraydivide-and-conquersorting+5 |
| 918 | Maximum Sum Circular Subarray | Medium | 1777 | arraydivide-and-conquerdynamic-programming+2 |
| 921 | Minimum Add to Make Parentheses Valid | Medium | 1248 | stringstackgreedy |
| 926 | Flip String to Monotone Increasing | Medium | 1602 | stringdynamic-programming |
| 930 | Binary Subarrays With Sum | Medium | 1592 | arrayhash-tablesliding-window+1 |
| 934 | Shortest Bridge | Medium | 1826 | arraydepth-first-searchbreadth-first-search+1 |
| 946 | Validate Stack Sequences | Medium | 1462 | arraystacksimulation |
| 947 | Most Stones Removed with Same Row or Column | Medium | 1899 | hash-tabledepth-first-searchunion-find+1 |
| 950 | Reveal Cards In Increasing Order | Medium | 1686 | arrayqueuesorting+1 |
| 951 | Flip Equivalent Binary Trees | Medium | 1477 | treedepth-first-searchbinary-tree |
| 958 | Check Completeness of a Binary Tree | Medium | 1703 | treebreadth-first-searchbinary-tree |
| 973 | K Closest Points to Origin | Medium | 1470 | arraymathdivide-and-conquer+4 |
| 974 | Subarray Sums Divisible by K | Medium | 1592 | arrayhash-tableprefix-sum |
| 978 | Longest Turbulent Subarray | Medium | 1393 | arraydynamic-programmingsliding-window |
| 981 | Time Based Key-Value Store | Medium | 1676 | hash-tablestringbinary-search+1 |
| 983 | Minimum Cost For Tickets | Medium | 1786 | arraydynamic-programming |
| 986 | Interval List Intersections | Medium | 1579 | arraytwo-pointers |
| 990 | Satisfiability of Equality Equations | Medium | 1638 | arraystringunion-find+1 |
| 994 | Rotting Oranges | Medium | 1571 | arraybreadth-first-searchmatrix |
| 1004 | Max Consecutive Ones III | Medium | 1655 | arraybinary-searchsliding-window+1 |
| 1008 | Construct Binary Search Tree from Preorder Traversal | Medium | 1563 | arraystacktree+3 |
| 1011 | Capacity To Ship Packages Within D Days | Medium | 1725 | arraybinary-search |
| 1019 | Next Greater Node In Linked List | Medium | 1546 | arraylinked-liststack+1 |
| 1020 | Number of Enclaves | Medium | 1615 | arraydepth-first-searchbreadth-first-search+2 |
| 1023 | Camelcase Matching | Medium | 1537 | arraytwo-pointersstring+2 |
| 1029 | Two City Scheduling | Medium | 1441 | arraygreedysorting |
| 1035 | Uncrossed Lines | Medium | 1806 | arraydynamic-programming |
| 1038 | Binary Search Tree to Greater Sum Tree | Medium | 1375 | treedepth-first-searchbinary-search-tree+1 |
| 1041 | Robot Bounded In Circle | Medium | 1521 | mathstringsimulation |
| 1049 | Last Stone Weight II | Medium | 2092 | arraydynamic-programming |
| 1079 | Letter Tile Possibilities | Medium | 1741 | hash-tablestringbacktracking+1 |
| 1091 | Shortest Path in Binary Matrix | Medium | 1655 | arraybreadth-first-searchmatrix |
| 1094 | Car Pooling | Medium | 1441 | arraysortingheap-priority-queue+2 |
| 1101 | The Earliest Moment When Everyone Become Friends | Medium | 1469 | arrayunion-findsorting |
| 1129 | Shortest Path with Alternating Colors | Medium | 1780 | breadth-first-searchgraph |