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1396 problems

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Problem	Difficulty	Frequency	Topics
835. Image Overlap	Medium	5%	ArrayMatrix
3898. Find the Degree of Each Vertex	Easy	5%	ArrayGraph TheoryMatrix
Delete Operation for Two Strings	Medium	5%	StringDynamic ProgrammingLongest Common Subsequence
1621. Number of Sets of K Non-Overlapping Line Segments	Medium	5%	MathDynamic ProgrammingCombinatoricsPrefix Sum
1477. Find Two Non-overlapping Sub-arrays Each With Target Sum	Medium	5%	ArrayHash TableBinary SearchDynamic ProgrammingSliding Window
1791. Find Center of Star Graph	Easy	5%	Graph Theory
1000. Minimum Cost to Merge Stones	Hard	5%	ArrayDynamic ProgrammingPrefix Sum
2233. Maximum Product After K Increments	Medium	5%	ArrayGreedyHeap (Priority Queue)
1190. Reverse Substrings Between Each Pair of Parentheses	Medium	5%	StringStackBracket Sequences
Classes With at Least 5 Students	Easy	5%	Database
2455. Average Value of Even Numbers That Are Divisible by Three	Easy	5%	ArrayMath
3120. Count the Number of Special Characters I	Easy	5%	Hash TableString
999. Available Captures for Rook	Easy	5%	ArrayMatrixSimulation
3186. Maximum Total Damage With Spell Casting	Medium	5%	ArrayHash TableTwo PointersBinary SearchDynamic ProgrammingSortingCounting
3654. Minimum Sum After Divisible Sum Deletions	Medium	5%	ArrayHash TableDynamic ProgrammingPrefix Sum
1876. Substrings of Size Three with Distinct Characters	Easy	5%	Hash TableStringSliding WindowCounting
Method Chaining	Easy	5%	—
3727. Maximum Alternating Sum of Squares	Medium	5%	ArrayGreedySorting
917. Reverse Only Letters	Easy	5%	Two PointersString
3723. Maximize Sum of Squares of Digits	Medium	5%	MathGreedy
1343. Number of Sub-arrays of Size K and Average Greater than or Equal to Threshold	Medium	5%	ArraySliding Window