| 673 | Number of Longest Increasing Subsequence | ArrayDynamic ProgrammingBinary Indexed Tree+1 | Medium |
| 676 | Implement Magic Dictionary | Hash TableStringDepth-First Search+2 | Medium |
| 677 | Map Sum Pairs | Hash TableStringDesign+1 | Medium |
| 678 | Valid Parenthesis String | StringDynamic ProgrammingStack+1 | Medium |
| 684 | Redundant Connection | Depth-First SearchBreadth-First SearchUnion Find+1 | Medium |
| 686 | Repeated String Match | StringString Matching | Medium |
| 687 | Longest Univalue Path | TreeDepth-First SearchBinary Tree | Medium |
| 688 | Knight Probability in Chessboard | Dynamic Programming | Medium |
| 690 | Employee Importance | ArrayHash TableTree+2 | Medium |
| 692 | Top K Frequent Words | ArrayHash TableString+5 | Medium |
| 695 | Max Area of Island | ArrayDepth-First SearchBreadth-First Search+2 | Medium |
| 698 | Partition to K Equal Sum Subsets | ArrayDynamic ProgrammingBacktracking+3 | Medium |
| 701 | Insert into a Binary Search Tree | TreeBinary Search TreeBinary Tree | Medium |
| 707 | Design Linked List | Linked ListDesign | Medium |
| 712 | Minimum ASCII Delete Sum for Two Strings | StringDynamic Programming | Medium |
| 713 | Subarray Product Less Than K | ArrayBinary SearchSliding Window+1 | Medium |
| 714 | Best Time to Buy and Sell Stock with Transaction Fee | ArrayDynamic ProgrammingGreedy | Medium |
| 718 | Maximum Length of Repeated Subarray | ArrayBinary SearchDynamic Programming+3 | Medium |
| 720 | Longest Word in Dictionary | ArrayHash TableString+2 | Medium |
| 721 | Accounts Merge | ArrayHash TableString+4 | Medium |
| 722 | Remove Comments | ArrayString | Medium |
| 725 | Split Linked List in Parts | Linked List | Medium |
| 729 | My Calendar I | ArrayBinary SearchDesign+2 | Medium |
| 731 | My Calendar II | ArrayBinary SearchDesign+3 | Medium |
| 735 | Asteroid Collision | ArrayStackSimulation | Medium |
| 738 | Monotone Increasing Digits | MathGreedy | Medium |
| 739 | Daily Temperatures | ArrayStackMonotonic Stack | Medium |
| 740 | Delete and Earn | ArrayHash TableDynamic Programming | Medium |
| 743 | Network Delay Time | Depth-First SearchBreadth-First SearchGraph+2 | Medium |
| 752 | Open the Lock | ArrayHash TableString+1 | Medium |
| 754 | Reach a Number | MathBinary Search | Medium |
| 756 | Pyramid Transition Matrix | Bit ManipulationDepth-First SearchBreadth-First Search | Medium |
| 763 | Partition Labels | Hash TableTwo PointersString+1 | Medium |
| 764 | Largest Plus Sign | ArrayDynamic Programming | Medium |
| 767 | Reorganize String | Hash TableStringGreedy+3 | Medium |
| 769 | Max Chunks To Make Sorted | ArrayStackGreedy+2 | Medium |
| 775 | Global and Local Inversions | ArrayMath | Medium |
| 777 | Swap Adjacent in LR String | Two PointersString | Medium |
| 779 | K-th Symbol in Grammar | MathBit ManipulationRecursion | Medium |
| 781 | Rabbits in Forest | ArrayHash TableMath+1 | Medium |
| 784 | Letter Case Permutation | StringBacktrackingBit Manipulation | Medium |
| 785 | Is Graph Bipartite? | Depth-First SearchBreadth-First SearchUnion Find+1 | Medium |
| 786 | K-th Smallest Prime Fraction | ArrayTwo PointersBinary Search+2 | Medium |
| 787 | Cheapest Flights Within K Stops | Dynamic ProgrammingDepth-First SearchBreadth-First Search+3 | Medium |
| 788 | Rotated Digits | MathDynamic Programming | Medium |
| 789 | Escape The Ghosts | ArrayMath | Medium |
| 790 | Domino and Tromino Tiling | Dynamic Programming | Medium |
| 791 | Custom Sort String | Hash TableStringSorting | Medium |
| 792 | Number of Matching Subsequences | ArrayHash TableString+4 | Medium |
| 794 | Valid Tic-Tac-Toe State | ArrayMatrix | Medium |