| 706 | Design HashMap | Easy | — | arrayhash-tablelinked-list+2 |
| 724 | Find Pivot Index | Easy | 1204 | arrayprefix-sum |
| 733 | Flood Fill | Easy | 1139 | arraydepth-first-searchbreadth-first-search+1 |
| 746 | Min Cost Climbing Stairs | Easy | 1167 | arraydynamic-programming |
| 762 | Prime Number of Set Bits in Binary Representations | Easy | 1262 | mathbit-manipulation |
| 783 | Minimum Distance Between BST Nodes | Easy | 1303 | treedepth-first-searchbreadth-first-search+2 |
| 860 | Lemonade Change | Easy | 1186 | arraygreedy |
| 872 | Leaf-Similar Trees | Easy | 1307 | treedfsrecursion |
| 876 | Middle of the Linked List | Easy | 1168 | linked-listtwo-pointers |
| 914 | X of a Kind in a Deck of Cards | Easy | 1371 | arrayhash-tablemath+2 |
| 929 | Unique Email Addresses | Easy | 1199 | arrayhash-tablestring |
| 933 | Number of Recent Calls | Easy | 1337 | queuedata-stream |
| 953 | Verifying an Alien Dictionary | Easy | 1300 | arrayhash-tablestring |
| 977 | Squares of a Sorted Array | Easy | 1130 | arraytwo-pointerssorting |
| 989 | Add to Array-Form of Integer | Easy | 1235 | arraymath |
| 1013 | Partition Array Into Three Parts With Equal Sum | Easy | 1248 | arraygreedyprefix-sum |
| 1046 | Last Stone Weight | Easy | 1172 | arrayheap-priority-queue |
| 1071 | Greatest Common Divisor of Strings | Easy | 1397 | stringmath |
| 1137 | N-th Tribonacci Number | Easy | 1228 | dynamic-programmingmathmemoization |
| 1189 | Maximum Number of Balloons | Easy | 1182 | hash-tablestringcounting |
| 1207 | Unique Number of Occurrences | Easy | 1195 | hash-tablearray |
| 1260 | Shift 2D Grid | Easy | 1337 | arraymatrixsimulation |
| 1299 | Replace Elements with Greatest Element on Right Side | Easy | 1219 | array |
| 1356 | Sort Integers by The Number of 1 Bits | Easy | 1175 | bit-manipulationsorting |
| 1431 | Kids With the Greatest Number of Candies | Easy | 1118 | arraygreedy |
| 1470 | Shuffle the Array | Easy | 1121 | array |
| 1475 | Final Prices With a Special Discount in a Shop | Easy | 1225 | arraystackmonotonic-stack |
| 1480 | Running Sum of 1d Array | Easy | 1133 | arrayprefix-sum |
| 1486 | XOR Operation in an Array | Easy | 1176 | bit-manipulationmath |
| 1523 | Count Odd Numbers in an Interval Range | Easy | 1209 | math |
| 1572 | Matrix Diagonal Sum | Easy | 1280 | arraymatrix |
| 1603 | Design Parking System | Easy | 1324 | designsimulationcounting |
| 1656 | Design an Ordered Stream | Easy | 1419 | arrayhash-tabledesign+1 |
| 1700 | Number of Students Unable to Eat Lunch | Easy | 1404 | arraystackqueue+1 |
| 1720 | Decode XORed Array | Easy | 1199 | bit-manipulationarray |
| 1732 | Find the Highest Altitude | Easy | 1172 | arrayprefix-sum |
| 1768 | Merge Strings Alternately | Easy | 1150 | stringtwo-pointers |
| 1822 | Sign of the Product of an Array | Easy | 1210 | arraymath |
| 1863 | Sum of All Subset XOR Totals | Easy | 1372 | arraymathbacktracking+3 |
| 1929 | Concatenation of Array | Easy | 1133 | arraysimulation |
| 1971 | Find if Path Exists in Graph | Easy | — | depth-first-searchbreadth-first-searchunion-find+1 |
| 1984 | Minimum Difference Between Highest and Lowest of K Scores | Easy | 1306 | arraysliding-windowsorting |
| 2073 | Time Needed to Buy Tickets | Easy | 1325 | arrayqueuesimulation |
| 2215 | Find the Difference of Two Arrays | Easy | 1207 | arrayhash-table |
| 3042 | Count Prefix and Suffix Pairs I | Easy | 1214 | arraystringtrie+3 |
| 3222 | Find the Winning Player in Coin Game | Easy | 1270 | mathsimulationgame-theory |
| 3461 | Check If Digits Are Equal in String After Operations I | Easy | 1189 | mathstringsimulation+2 |
| 3477 | Fruits Into Baskets II | Easy | 1296 | arraybinary-searchsegment-tree+2 |