| Sequence Reconstruction | Open ↗ |
| Sequential Digits | Open ↗ |
| Sequentially Ordinal Rank Tracker | Open ↗ |
| Serialize and Deserialize a Binary Tree | Open ↗ |
| Serialize and Deserialize Binary Tree | Open ↗ |
| Serialize and Deserialize BST | Open ↗ |
| Serialize and Deserialize N-ary Tree | Open ↗ |
| Set Intersection Size At Least Two | Open ↗ |
| Set Matrix Zeroes | Open ↗ |
| Set Mismatch | Open ↗ |
| Shift 2D Grid | Open ↗ |
| Shift Distance Between Two Strings | Open ↗ |
| Shifting Letters | Open ↗ |
| Shifting Letters II | Open ↗ |
| Shopping Offers | Open ↗ |
| Short Encoding of Words | Open ↗ |
| Shortest and Lexicographically Smallest Beautiful String | Open ↗ |
| Shortest Bridge | Open ↗ |
| Shortest Common Supersequence | Open ↗ |
| Shortest Common Supersequence | Open ↗ |
| Shortest Completing Word | Open ↗ |
| Shortest Cycle in a Graph | Open ↗ |
| Shortest Distance After Road Addition Queries I | Open ↗ |
| Shortest Distance from All Buildings | Open ↗ |
| Shortest Distance in a Plane | Open ↗ |
| Shortest distance in infinite tree | Open ↗ |
| Shortest Distance to a Character | Open ↗ |
| Shortest Distance to Target Color | Open ↗ |
| Shortest Distance to Target String in a Circular Array | Open ↗ |
| Shortest Impossible Sequence of Rolls | Open ↗ |
| Shortest Job First | Open ↗ |
| Shortest Matching Substring | Open ↗ |
| Shortest Palindrome | Open ↗ |
| Shortest path from 1 to n | Open ↗ |
| Shortest Path in a Grid with Obstacles Elimination | Open ↗ |
| Shortest Path in a Hidden Grid | Open ↗ |
| Shortest Path in a Weighted Tree | Open ↗ |
| Shortest Path in Binary Matrix | Open ↗ |
| Shortest path in DAG | Open ↗ |
| Shortest path in Directed Acyclic Graph | Open ↗ |
| Shortest path in undirected graph with unit weights | Open ↗ |
| Shortest Path to Get All Keys | Open ↗ |
| Shortest Path to Get Food | Open ↗ |
| Shortest Path Using Atmost One Curved Edge | Open ↗ |
| Shortest Path Visiting All Nodes | Open ↗ |
| Shortest Path with Alternating Colors | Open ↗ |
| Shortest Range In BST | Open ↗ |
| Shortest Source to Destination Path | Open ↗ |
| Shortest String That Contains Three Strings | Open ↗ |
| Shortest Subarray to be Removed to Make Array Sorted | Open ↗ |
| Shortest Subarray With OR at Least K I | Open ↗ |
| Shortest Subarray With OR at Least K II | Open ↗ |
| Shortest Subarray with Sum at Least K | Open ↗ |
| Shortest Uncommon Substring in an Array | Open ↗ |
| Shortest Unique prefix for every word | Open ↗ |
| Shortest Unsorted Continuous Subarray | Open ↗ |
| Shortest Way to Form String | Open ↗ |
| Shortest Word Distance | Open ↗ |
| Shortest Word Distance II | Open ↗ |
| Shortest Word Distance III | Open ↗ |
| Shortest XY distance in Grid | Open ↗ |
| Shuffle an Array | Open ↗ |
| Shuffle String | Open ↗ |
| Shuffle the Array | Open ↗ |
| Sign of the Product of an Array | Open ↗ |
| Similar RGB Color | Open ↗ |
| Similar String Groups | Open ↗ |
| Simple Bank System | Open ↗ |
| Simplified Fractions | Open ↗ |
| Simplify Directory Path | Open ↗ |
| Simplify Path | Open ↗ |
| Single Element in a Sorted Array | Open ↗ |
| Single Number | Open ↗ |
| Single Number - II | Open ↗ |
| Single Number II | Open ↗ |
| Single Number - III | Open ↗ |
| Single Number III | Open ↗ |
| Single-Row Keyboard | Open ↗ |
| Single-Threaded CPU | Open ↗ |
| Size of Binary Tree | Open ↗ |
| Sleep | Open ↗ |
| Sliding Puzzle | Open ↗ |
| Sliding Subarray Beauty | Open ↗ |
| Sliding Window Maximum | Open ↗ |
| Sliding Window Maximum | Open ↗ |
| Sliding Window Median | Open ↗ |
| Smallest Common Region | Open ↗ |
| Smallest distinct window | Open ↗ |
| Smallest Divisible Digit Product I | Open ↗ |
| Smallest Divisible Digit Product II | Open ↗ |
| Smallest Even Multiple | Open ↗ |
| Smallest Good Base | Open ↗ |
| Smallest Greater Multiple Made of Two Digits | Open ↗ |
| Smallest Index With Digit Sum Equal to Index | Open ↗ |
| Smallest Index With Equal Value | Open ↗ |
| Smallest Integer Divisible by K | Open ↗ |
| Smallest K-Length Subsequence With Occurrences of a Letter | Open ↗ |
| Smallest Missing Integer Greater Than Sequential Prefix Sum | Open ↗ |
| Smallest Missing Non-negative Integer After Operations | Open ↗ |
| Smallest Number in Infinite Set | Open ↗ |