| Substring Concatenation | Open ↗ |
| Substring Matching Pattern | Open ↗ |
| Substrings of Size Three with Distinct Characters | Open ↗ |
| Substrings with same first and last characters | Open ↗ |
| Substring with Concatenation of All Words | Open ↗ |
| Substring With Largest Variance | Open ↗ |
| Substring XOR Queries | Open ↗ |
| Subtraction in Linked List | Open ↗ |
| Subtract the Product and Sum of Digits of an Integer | Open ↗ |
| Subtract two numbers represented as linked lists | Open ↗ |
| Subtree of Another Tree | Open ↗ |
| Subtree Removal Game with Fibonacci Tree | Open ↗ |
| Successful Pairs of Spells and Potions | Open ↗ |
| Sudoku | Open ↗ |
| Sudoku Solver | Open ↗ |
| Sudoku Solver | Open ↗ |
| Sum Game | Open ↗ |
| Summary Ranges | Open ↗ |
| Sum Multiples | Open ↗ |
| Sum of Absolute Differences in a Sorted Array | Open ↗ |
| Sum of All Odd Length Subarrays | Open ↗ |
| Sum of All Subset XOR Totals | Open ↗ |
| Sum of Array Elements | Open ↗ |
| Sum of Array Elements II | Open ↗ |
| Sum of Beautiful Subsequences | Open ↗ |
| Sum of Beauty in the Array | Open ↗ |
| Sum of Beauty of All Substrings | Open ↗ |
| Sum of Binary Tree | Open ↗ |
| Sum of Digit Differences of All Pairs | Open ↗ |
| Sum of Digits in a Given Number | Open ↗ |
| Sum of Digits in Base K | Open ↗ |
| Sum of Digits in the Minimum Number | Open ↗ |
| Sum of Digits of String After Convert | Open ↗ |
| Sum of Distances | Open ↗ |
| Sum of Distances in Tree | Open ↗ |
| Sum of elements between k1'th and k2'th smallest elements | Open ↗ |
| Sum of Even Numbers After Queries | Open ↗ |
| Sum of f(a[i], a[j]) over all pairs in an array of n integers | Open ↗ |
| Sum of First N Numbers | Open ↗ |
| Sum of GCD of Formed Pairs | Open ↗ |
| Sum of Good Numbers | Open ↗ |
| Sum of Good Subsequences | Open ↗ |
| Sum of Highest and Lowest Frequency | Open ↗ |
| Sum of Imbalance Numbers of All Subarrays | Open ↗ |
| Sum of k-Mirror Numbers | Open ↗ |
| Sum of k smallest elements in BST | Open ↗ |
| Sum of Left Leaves | Open ↗ |
| Sum of minimum and maximum elements of all subarrays of size “k”. | Open ↗ |
| Sum of Mutated Array Closest to Target | Open ↗ |
| Sum of Nodes on the Longest path from root to leaf node | Open ↗ |
| Sum of Nodes with Even-Valued Grandparent | Open ↗ |
| Sum of Number and Its Reverse | Open ↗ |
| Sum of Perfect Square Ancestors | Open ↗ |
| Sum of Prefix Scores of Strings | Open ↗ |
| Sum of Remoteness of All Cells | Open ↗ |
| Sum of Root To Leaf Binary Numbers | Open ↗ |
| Sum of Scores of Built Strings | Open ↗ |
| Sum Of Special Evenly-Spaced Elements In Array | Open ↗ |
| Sum of Square Numbers | Open ↗ |
| Sum of Squares of Special Elements | Open ↗ |
| Sum of Subarray Minimums | Open ↗ |
| Sum of Subarray Ranges | Open ↗ |
| Sum of Subsequence Widths | Open ↗ |
| Sum of Total Strength of Wizards | Open ↗ |
| Sum of Two Integers | Open ↗ |
| Sum of two large numbers | Open ↗ |
| Sum of two linked lists | Open ↗ |
| Sum of Unique Elements | Open ↗ |
| Sum of Values at Indices With K Set Bits | Open ↗ |
| Sum of Variable Length Subarrays | Open ↗ |
| Sum Root to Leaf Numbers | Open ↗ |
| Super Egg Drop | Open ↗ |
| Super Palindromes | Open ↗ |
| Super Pow | Open ↗ |
| Super Ugly Number | Open ↗ |
| Super Washing Machines | Open ↗ |
| Surface Area of 3D Shapes | Open ↗ |
| Surrounded Regions | Open ↗ |
| Swap Adjacent in LR String | Open ↗ |
| Swap and Maximize | Open ↗ |
| Swap For Longest Repeated Character Substring | Open ↗ |
| Swap Nodes in Pairs | Open ↗ |
| Swapping Nodes in a Linked List | Open ↗ |
| Swap Sex of Employees | Open ↗ |
| Swim in Rising Water | Open ↗ |
| Symmetric Coordinates | Open ↗ |
| Symmetric Tree | Open ↗ |
| Synonymous Sentences | Open ↗ |
| Tag Validator | Open ↗ |
| Take Gifts From the Richest Pile | Open ↗ |
| Take K of Each Character From Left and Right | Open ↗ |
| Taking Maximum Energy From the Mystic Dungeon | Open ↗ |
| Tallest Billboard | Open ↗ |
| Target Sum | Open ↗ |
| Task Scheduler | Open ↗ |
| Task Scheduler II | Open ↗ |
| Team Scores in Football Tournament | Open ↗ |
| Teemo Attacking | Open ↗ |
| Tenth Line | Open ↗ |
| Ternary Expression Parser | Open ↗ |