Problems

3,898+ problems · 938 Easy · 2039 Medium · 921 Hard

Active:Hard· 921 results

Title	Solution	Practice	Difficulty	Companies	Topics
3425. Longest Special Path	Solution	Solve	Hard	-	Array Depth-First Search+3
3405. Count the Number of Arrays with K Matching Adjacent Elements	Solution	Solve	Hard	Amazon+4	Combinatorics Math
3378. Count Connected Components in LCM Graph	Solution	Solve	Hard	-	Array Hash Table+3
3420. Count Non-Decreasing Subarrays After K Operations	Solution	Solve	Hard	Google+1	Array Monotonic Queue+5
3389. Minimum Operations to Make Character Frequencies Equal	Solution	Solve	Hard	Google+1	Counting Dynamic Programming+3
3414. Maximum Score of Non-overlapping Intervals	Solution	Solve	Hard	Amazon+1	Array Binary Search+2
3888. Minimum Operations to Make All Grid Elements Equal	Solution	Solve	Hard	-
3883. Count Non Decreasing Arrays With Given Digit Sums	Solution	Solve	Hard	-	Array Dynamic Programming+1
3886. Sum of Sortable Integers	Solution	Solve	Hard	-	Array Enumeration+2
3887. Incremental Even-Weighted Cycle Queries	Solution	Solve	Hard	-	Graph Union Find
3892. Minimum Operations to Achieve At Least K Peaks	Solution	Solve	Hard	-	Array Dynamic Programming
3897. Maximum Value of Concatenated Binary Segments	Solution	Solve	Hard	-
3901. Good Subsequence Queries	Solution	Solve	Hard	-
3906. Count Good Integers on a Grid Path	Solution	Solve	Hard	-	Dynamic Programming
3911. K-th Smallest Remaining Even Integer in Subarray Queries	Solution	Solve	Hard	-
3910. Count Connected Subgraphs with Even Node Sum	Solution	Solve	Hard	-
3915. Maximum Sum of Alternating Subsequence With Distance at Least K	Solution	Solve	Hard	-
3916. Number of ZigZag Arrays III	Solution	Solve	Hard	-
3920. Maximize Fixed Points After Deletions	Solution	Solve	Hard	-
3924. Minimum Threshold Path With Limited Heavy Edges	Solution	Solve	Hard	-
3928. Minimum Cost to Buy Apples II	Solution	Solve	Hard	-