Skip to content

For employers Sign in

Make and follow sheets.Sign in

Problems

31 problems

Has video Premium only Reset

Two Pointers Array566 Dynamic Programming328 String188 Math182 Binary Search133 Hash Table132 Sorting104 Greedy102 Bit Manipulation101 Graph92 Depth-First Search88 Heap (Priority Queue)77 Prefix Sum75 Matrix74 Breadth-First Search70 All topics

Hard · With video · 31 results

Sign in to see which of these you have solved.Sign in

TitleSolutionAcceptDifficultyTopics

42. Trapping Rain WaterVideo

Solution68.2%Hard

Array, Dynamic Programming +3· 73 companies

272. Closest Binary Search Tree Value IIVideoPremium

Solution61.1%Hard

Binary Search Tree, Binary Tree +5· 3 companies

295. Find Median from Data StreamVideo

Solution54.9%Hard

Data Stream, Design +3· 40 companies

321. Create Maximum NumberVideo

Solution37.3%Hard

Array, Greedy +3· 7 companies

719. Find K-th Smallest Pair DistanceVideo

Solution46.4%Hard

Array, Binary Search +2· 5 companies

1147. Longest Chunked Palindrome DecompositionVideo

Solution58.6%Hard

Dynamic Programming, Greedy +4· 1 company

1163. Last Substring in Lexicographical OrderVideo

Solution35.1%Hard

String, Two Pointers· 5 companies

1537. Get the Maximum ScoreVideo

Solution41.5%Hard

Array, Dynamic Programming +2· 5 companies

1697. Checking Existence of Edge Length Limited PathsVideo

Solution63.8%Hard

Array, Graph +3· 3 companies

1755. Closest Subsequence SumVideo

Solution45.3%Hard

Array, Bit Manipulation +3· 3 companies

1782. Count Pairs Of NodesVideo

Solution43.3%Hard

Array, Binary Search +3· 1 company

1793. Maximum Score of a Good SubarrayVideo

Solution64.3%Hard

Array, Binary Search +3· 2 companies

1842. Next Palindrome Using Same DigitsVideoPremium

Solution54.2%Hard

String, Two Pointers· 1 company

2035. Partition Array Into Two Arrays to Minimize Sum DifferenceVideo

Solution24.4%Hard

Array, Binary Search +5· 9 companies

2122. Recover the Original ArrayVideo

Solution42.0%Hard

Array, Enumeration +3· 1 company

2193. Minimum Number of Moves to Make PalindromeVideo

Solution52.7%Hard

Binary Indexed Tree, Greedy +2· 5 companies

2234. Maximum Total Beauty of the GardensVideo

Solution30.4%Hard

Array, Binary Search +3· 1 company

2472. Maximum Number of Non-overlapping Palindrome SubstringsVideo

Solution60.9%Hard

Dynamic Programming, Greedy +2· 5 companies

2503. Maximum Number of Points From Grid QueriesVideo

Solution59.3%Hard

Array, Breadth-First Search +5· 6 companies

2565. Subsequence With the Minimum ScoreVideo

Solution33.8%Hard

Binary Search, String +1· 1 company

2604. Minimum Time to Eat All GrainsVideoPremium

Solution40.8%Hard

Array, Binary Search +2· 1 company

2911. Minimum Changes to Make K Semi-palindromesVideo

Solution35.3%Hard

Dynamic Programming, String +1

2972. Count the Number of Incremovable Subarrays IIVideo

Solution39.8%Hard

Array, Binary Search +1· 3 companies

3008. Find Beautiful Indices in the Given Array IIVideo

Solution28.3%Hard

Binary Search, Hash Function +4· 3 companies

3406. Find the Lexicographically Largest String From the Box IIVideoPremium

Solution48.9%Hard

String, Two Pointers

3455. Shortest Matching SubstringVideo

Solution24.5%Hard

Binary Search, String +2· 1 company

3504. Longest Palindrome After Substring Concatenation IIVideo

Solution18.4%Hard

Dynamic Programming, String +1· 1 company

3534. Path Existence Queries in a Graph IIVideo

Solution64.2%Hard

Array, Binary Search +6· 4 companies

3734. Lexicographically Smallest Palindromic Permutation Greater Than TargetVideo

Solution55.3%Hard

Enumeration, String +1

3801. Minimum Cost to Merge Sorted ListsVideo

Solution33.8%Hard

Array, Binary Search +3

3999. Minimum Number of String Groups Through TransformationsVideo

–47.9%Hard

Hash Table, String +1

Showing 1–31 of 31