| 858 | Mirror Reflection | Medium |
| 859 | Buddy Strings | Easy |
| 860 | Lemonade Change | Easy |
| 861 | Score After Flipping Matrix | Medium |
| 862 | Shortest Subarray with Sum at Least K | Hard |
| 863 | All Nodes Distance K in Binary Tree | Medium |
| 864 | Image Overlap | Medium |
| 864 | Shortest Path to Get All Keys | Hard |
| 865 | Smallest Subtree with all the Deepest Nodes | Medium |
| 866 | Prime Palindrome | Medium |
| 867 | Transpose Matrix | Easy |
| 868 | Binary Gap | Easy |
| 869 | Reordered Power of 2 | Medium |
| 870 | Advantage Shuffle | Medium |
| 871 | Minimum Number of Refueling Stops | Hard |
| 872 | Leaf-Similar Trees | Easy |
| 873 | Length of Longest Fibonacci Subsequence | Medium |
| 874 | Walking Robot Simulation | Medium |
| 875 | Koko Eating Bananas | Medium |
| 876 | Middle of the Linked List | Easy |
| 877 | Shortest Path Visiting All Nodes | Hard |
| 877 | Stone Game | Medium |
| 878 | Nth Magical Number | Hard |
| 879 | Profitable Schemes | Hard |
| 880 | Decoded String at Index | Medium |
| 881 | Boats to Save People | Medium |
| 882 | Reachable Nodes In Subdivided Graph | Hard |
| 883 | Projection Area of 3D Shapes | Easy |
| 884 | Uncommon Words from Two Sentences | Easy |
| 885 | Spiral Matrix III | Medium |