| 119. Pascal's Triangle IIOpen source | Easy | ArrayDynamic Programming |
| 120. TriangleOpen source | Medium | ArrayDynamic Programming |
| 121. Best Time to Buy and Sell StockOpen source | Easy | ArrayDynamic Programming |
| 122. Best Time to Buy and Sell Stock IIOpen source | Medium | ArrayDynamic ProgrammingGreedy |
| 123. Best Time to Buy and Sell Stock IIIOpen source | Hard | ArrayDynamic Programming |
| 128. Longest Consecutive SequenceOpen source | Medium | ArrayHash TableUnion-Find |
| 130. Surrounded RegionsOpen source | Medium | ArrayDepth-First SearchBreadth-First Search+2 more |
| 134. Gas StationOpen source | Medium | ArrayGreedy |
| 135. CandyOpen source | Hard | ArrayGreedy |
| 136. Single NumberOpen source | Easy | ArrayBit Manipulation |
| 137. Single Number IIOpen source | Medium | ArrayBit Manipulation |
| 139. Word BreakOpen source | Medium | ArrayHash TableString+4 more |
| 140. Word Break IIOpen source | Hard | ArrayHash TableString+4 more |
| 149. Max Points on a LineOpen source | Hard | ArrayHash TableMath+3 more |
| 150. Evaluate Reverse Polish NotationOpen source | Medium | ArrayMathStack |
| 152. Maximum Product SubarrayOpen source | Medium | ArrayDynamic Programming |
| 153. Find Minimum in Rotated Sorted ArrayOpen source | Medium | ArrayBinary Search |
| 154. Find Minimum in Rotated Sorted Array IIOpen source | Hard | ArrayBinary Search |
| 157. Read N Characters Given Read4Open sourcePremium | Easy | ArraySimulationInteractive |
| 158. Read N Characters Given read4 II - Call Multiple TimesOpen sourcePremium | Hard | ArraySimulationInteractive |
| 162. Find Peak ElementOpen source | Medium | ArrayBinary Search |
| 163. Missing RangesOpen sourcePremium | Easy | Array |
| 164. Maximum GapOpen source | Medium | ArraySortingBucket Sort+2 more |
| 167. Two Sum II - Input Array Is SortedOpen source | Medium | ArrayTwo PointersBinary Search |
| 169. Majority ElementOpen source | Easy | ArrayHash TableDivide and Conquer+3 more |