| 1177 | Can Make Palindrome from Substring | Medium |
| 1186 | Maximum Subarray Sum with One Deletion | Medium |
| 1190 | Reverse Substrings Between Each Pair of Parentheses | Medium |
| 1191 | K-Concatenation Maximum Sum | Medium |
| 1195 | Fizz Buzz Multithreaded | Medium |
| 1201 | Ugly Number III | Medium |
| 1202 | Smallest String With Swaps | Medium |
| 1208 | Get Equal Substrings Within Budget | Medium |
| 1209 | Remove All Adjacent Duplicates in String II | Medium |
| 1218 | Longest Arithmetic Subsequence of Given Difference | Medium |
| 1219 | Path with Maximum Gold | Medium |
| 1222 | Queens That Can Attack the King | Medium |
| 1226 | The Dining Philosophers | Medium |
| 1227 | Airplane Seat Assignment Probability | Medium |
| 1233 | Remove Sub-Folders from the Filesystem | Medium |
| 1234 | Replace the Substring for Balanced String | Medium |
| 1237 | Find Positive Integer Solution for a Given Equation | Medium |
| 1238 | Circular Permutation in Binary Representation | Medium |
| 1239 | Maximum Length of a Concatenated String with Unique Characters | Medium |
| 1247 | Minimum Swaps to Make Strings Equal | Medium |
| 1248 | Count Number of Nice Subarrays | Medium |
| 1249 | Minimum Remove to Make Valid Parentheses | Medium |
| 1253 | Reconstruct a 2-Row Binary Matrix | Medium |
| 1254 | Number of Closed Islands | Medium |
| 1261 | Find Elements in a Contaminated Binary Tree | Medium |
| 1262 | Greatest Sum Divisible by Three | Medium |
| 1267 | Count Servers that Communicate | Medium |
| 1268 | Search Suggestions System | Medium |
| 1276 | Number of Burgers with No Waste of Ingredients | Medium |
| 1277 | Count Square Submatrices with All Ones | Medium |