| 169 | Majority Element | — | Easy | ArrayHash TableDivide and Conquer | 66% | |
| 229 | Majority Element II | — | Medium | ArrayHash TableSorting | 54% | |
| 299 | Bulls and Cows | — | Medium | Hash TableStringCounting | 51% | |
| 347 | Top K Frequent Elements | — | Medium | ArrayHash TableDivide and Conquer | 64% | |
| 383 | Ransom Note | — | Easy | Hash TableStringCounting | 64% | |
| 387 | First Unique Character in a String | — | Easy | Hash TableStringQueue | 64% | |
| 451 | Sort Characters By Frequency | — | Medium | Hash TableStringSorting | 74% | |
| 594 | Longest Harmonious Subsequence | — | Easy | ArrayHash TableSliding Window | 57% | |
| 621 | Task Scheduler | — | Medium | ArrayHash TableGreedy | 61% | |
| 692 | Top K Frequent Words | — | Medium | ArrayHash TableString | 59% | |
| 767 | Reorganize String | — | Medium | Hash TableStringGreedy | 56% | |
| 811 | Subdomain Visit Count | — | Medium | ArrayHash TableString | 77% | |
| 819 | Most Common Word | — | Easy | ArrayHash TableString | 45% | |
| 869 | Reordered Power of 2 | — | Medium | Hash TableMathSorting | 62% | |
| 884 | Uncommon Words from Two Sentences | — | Easy | Hash TableStringCounting | 75% | |
| 900 | RLE Iterator | — | Medium | ArrayDesignCounting | 59% | |
| 914 | X of a Kind in a Deck of Cards | — | Easy | ArrayHash TableMath | 30% | |
| 923 | 3Sum With Multiplicity | — | Medium | ArrayHash TableTwo Pointers | 46% | |
| 945 | Minimum Increment to Make Array Unique | — | Medium | ArrayGreedySorting | 60% | |
| 992 | Subarrays with K Different Integers | — | Hard | ArrayHash TableSliding Window | 66% | |
| 1010 | Pairs of Songs With Total Durations Divisible by 60 | — | Medium | ArrayHash TableCounting | 53% | |
| 1054 | Distant Barcodes | — | Medium | ArrayHash TableGreedy | 47% | |
| 1079 | Letter Tile Possibilities | — | Medium | Hash TableStringBacktracking | 84% | |
| 1090 | Largest Values From Labelsread | — | Medium | ArrayHash TableGreedy | 63% | |
| 1128 | Number of Equivalent Domino Pairsread | — | Easy | ArrayHash TableCounting | 61% | |
| 1160 | Find Words That Can Be Formed by Characters | — | Easy | ArrayHash TableString | 71% | |
| 1189 | Maximum Number of Balloonsread | — | Easy | Hash TableStringCounting | 60% | |
| 1221 | Split a String in Balanced Strings | — | Easy | StringGreedyCounting | 87% | |
| 1267 | Count Servers that Communicate | — | Medium | ArrayDepth-First SearchBreadth-First Search | 73% | |
| 1347 | Minimum Number of Steps to Make Two Strings Anagramread | — | Medium | Hash TableStringCounting | 82% | |
| 1356 | Sort Integers by The Number of 1 Bits | — | Easy | ArrayBit ManipulationSorting | 79% | |
| 1366 | Rank Teams by Votes | — | Medium | ArrayHash TableString | 59% | |
| 1370 | Increasing Decreasing String | — | Easy | Hash TableStringCounting | 77% | |
| 1394 | Find Lucky Integer in an Arrayread | — | Easy | ArrayHash TableCounting | 69% | |
| 1400 | Construct K Palindrome Stringsread | — | Medium | Hash TableStringGreedy | 69% | |
| 1419 | Minimum Number of Frogs Croaking | — | Medium | StringCounting | 51% | |
| 1481 | Least Number of Unique Integers after K Removalsread | — | Medium | ArrayHash TableGreedy | 63% | |
| 1497 | Check If Array Pairs Are Divisible by k | — | Medium | ArrayHash TableCounting | 46% | |
| 1512 | Number of Good Pairsread | — | Easy | ArrayHash TableMath | 90% | |
| 1519 | Number of Nodes in the Sub-Tree With the Same Label | — | Medium | Hash TableTreeDepth-First Search | 55% | |
| 1603 | Design Parking System | — | Easy | DesignSimulationCounting | 87% | |
| 1657 | Determine if Two Strings Are Close | — | Medium | Hash TableStringSorting | 54% | |
| 1684 | Count the Number of Consistent Strings | — | Easy | ArrayHash TableString | 88% | |
| 1704 | Determine if String Halves Are Alike | — | Easy | StringCounting | 79% | |
| 1726 | Tuple with Same Product | — | Medium | ArrayHash TableCounting | 70% | |
| 1737 | Change Minimum Characters to Satisfy One of Three Conditionsread | — | Medium | Hash TableStringCounting | 37% | |
| 1742 | Maximum Number of Balls in a Boxread | — | Easy | Hash TableMathCounting | 74% | |
| 1748 | Sum of Unique Elementsread | — | Easy | ArrayHash TableCounting | 79% | |
| 1775 | Equal Sum Arrays With Minimum Number of Operations | — | Medium | ArrayHash TableGreedy | 54% | |
| 1781 | Sum of Beauty of All Substrings | — | Medium | Hash TableStringCounting | 70% | |