| 1090 | Largest Values From Labels | ArrayHash TableGreedy+2 | Medium |
| 1091 | Shortest Path in Binary Matrix | ArrayBreadth-First SearchMatrix | Medium |
| 1093 | Statistics from a Large Sample | ArrayMathProbability and Statistics | Medium |
| 1094 | Car Pooling | ArraySortingHeap (Priority Queue)+2 | Medium |
| 1104 | Path In Zigzag Labelled Binary Tree | MathTreeBinary Tree | Medium |
| 1105 | Filling Bookcase Shelves | ArrayDynamic Programming | Medium |
| 1109 | Corporate Flight Bookings | ArrayPrefix Sum | Medium |
| 1110 | Delete Nodes And Return Forest | ArrayHash TableTree+2 | Medium |
| 1111 | Maximum Nesting Depth of Two Valid Parentheses Strings | StringStack | Medium |
| 1115 | Print FooBar Alternately | Concurrency | Medium |
| 1116 | Print Zero Even Odd | Concurrency | Medium |
| 1117 | Building H2O | Concurrency | Medium |
| 1123 | Lowest Common Ancestor of Deepest Leaves | Hash TableTreeDepth-First Search+2 | Medium |
| 1124 | Longest Well-Performing Interval | ArrayHash TableStack+2 | Medium |
| 1129 | Shortest Path with Alternating Colors | Breadth-First SearchGraph | Medium |
| 1130 | Minimum Cost Tree From Leaf Values | ArrayDynamic ProgrammingStack+2 | Medium |
| 1131 | Maximum of Absolute Value Expression | ArrayMath | Medium |
| 1138 | Alphabet Board Path | Hash TableString | Medium |
| 1139 | Largest 1-Bordered Square | ArrayDynamic ProgrammingMatrix | Medium |
| 1140 | Stone Game II | ArrayMathDynamic Programming+2 | Medium |
| 1143 | Longest Common Subsequence | StringDynamic Programming | Medium |
| 1144 | Decrease Elements To Make Array Zigzag | ArrayGreedy | Medium |
| 1145 | Binary Tree Coloring Game | TreeDepth-First SearchBinary Tree | Medium |
| 1146 | Snapshot Array | ArrayHash TableBinary Search+1 | Medium |
| 1155 | Number of Dice Rolls With Target Sum | Dynamic Programming | Medium |
| 1156 | Swap For Longest Repeated Character Substring | Hash TableStringSliding Window | Medium |
| 1158 | Market Analysis I | Database | Medium |
| 1161 | Maximum Level Sum of a Binary Tree | TreeDepth-First SearchBreadth-First Search+1 | Medium |
| 1162 | As Far from Land as Possible | ArrayDynamic ProgrammingBreadth-First Search+1 | Medium |
| 1164 | Product Price at a Given Date | Database | Medium |
| 1169 | Invalid Transactions | ArrayHash TableString+1 | Medium |
| 1170 | Compare Strings by Frequency of the Smallest Character | ArrayHash TableString+2 | Medium |
| 1171 | Remove Zero Sum Consecutive Nodes from Linked List | Hash TableLinked List | Medium |
| 1174 | Immediate Food Delivery II | Database | Medium |
| 1177 | Can Make Palindrome from Substring | ArrayHash TableString+2 | Medium |
| 1186 | Maximum Subarray Sum with One Deletion | ArrayDynamic Programming | Medium |
| 1190 | Reverse Substrings Between Each Pair of Parentheses | StringStack | Medium |
| 1191 | K-Concatenation Maximum Sum | ArrayDynamic Programming | Medium |
| 1193 | Monthly Transactions I | Database | Medium |
| 1195 | Fizz Buzz Multithreaded | Concurrency | Medium |
| 1201 | Ugly Number III | MathBinary SearchCombinatorics+1 | Medium |
| 1202 | Smallest String With Swaps | ArrayHash TableString+4 | Medium |
| 1204 | Last Person to Fit in the Bus | Database | Medium |
| 1208 | Get Equal Substrings Within Budget | StringBinary SearchSliding Window+1 | Medium |
| 1209 | Remove All Adjacent Duplicates in String II | StringStack | Medium |
| 1218 | Longest Arithmetic Subsequence of Given Difference | ArrayHash TableDynamic Programming | Medium |
| 1219 | Path with Maximum Gold | ArrayBacktrackingMatrix | Medium |
| 1222 | Queens That Can Attack the King | ArrayMatrixSimulation | Medium |
| 1226 | The Dining Philosophers | Concurrency | Medium |
| 1227 | Airplane Seat Assignment Probability | MathDynamic ProgrammingBrainteaser+1 | Medium |