Problems

3,913+ problems · 941 Easy · 2046 Medium · 926 Hard

Title	Solution	Practice	Difficulty	Companies	Topics
3885. Design Event Manager	Solution	Solve	Medium	-	Array Design+3
3884. First Matching Character From Both Ends	Solution	Solve	Easy	-	String Two Pointers
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
3880. Minimum Absolute Difference Between Two Values	Solution	Solve	Easy	-	Array Enumeration
3881. Direction Assignments with Exactly K Visible People	Solution	Solve	Medium	-	Combinatorics Math
3882. Minimum XOR Path in a Grid	Solution	Solve	Medium	-	Array Bit Manipulation+2
3887. Incremental Even-Weighted Cycle Queries	Solution	Solve	Hard	-	Graph Union Find
3893. Maximum Team Size with Overlapping Intervals	Solution	Solve	Medium	-
3889. Mirror Frequency Distance	Solution	Solve	Medium	-	Counting Hash Table+1
3890. Integers With Multiple Sum of Two Cubes	Solution	Solve	Medium	-	Counting Enumeration+2
3892. Minimum Operations to Achieve At Least K Peaks	Solution	Solve	Hard	-	Array Dynamic Programming
3891. Minimum Increase to Maximize Special Indices	Solution	Solve	Medium	-	Array Dynamic Programming+2
3895. Count Digit Appearances	Solution	Solve	Medium	-	Array Math
3897. Maximum Value of Concatenated Binary Segments	Solution	Solve	Hard	-	Array Greedy+1
3896. Minimum Operations to Transform Array into Alternating Prime	Solution	Solve	Medium	-	Array Binary Search+4
3894. Traffic Signal Color	Solution	Solve	Easy	-	Math Simulation+1
3898. Find the Degree of Each Vertex	Solution	Solve	Easy	-	Array Graph+1
3899. Angles of a Triangle	Solution	Solve	Medium	-	Array Geometry+1
3900. Longest Balanced Substring After One Swap	Solution	Solve	Medium	-	Hash Table Prefix Sum+1
3901. Good Subsequence Queries	Solution	Solve	Hard	-	Array Math+2
3902. Zigzag Level Sum of Binary Tree	Solution	Solve	Medium	-
3907. Count Smaller Elements With Opposite Parity	Solution	Solve	Medium	-
3904. Smallest Stable Index II	Solution	Solve	Medium	-	Array
3903. Smallest Stable Index I	Solution	Solve	Easy	-	Array
3905. Multi Source Flood Fill	Solution	Solve	Medium	-	Array Breadth-First Search+1
3906. Count Good Integers on a Grid Path	Solution	Solve	Hard	-	Dynamic Programming
3909. Compare Sums of Bitonic Parts	Solution	Solve	Medium	-	Array
3912. Valid Elements in an Array	Solution	Solve	Easy	-	Array
3911. K-th Smallest Remaining Even Integer in Subarray Queries	Solution	Solve	Hard	-	Array Binary Search
3908. Valid Digit Number	Solution	Solve	Easy	-	Math
3913. Sort Vowels by Frequency	Solution	Solve	Medium	-	Counting Sorting+1
3910. Count Connected Subgraphs with Even Node Sum	Solution	Solve	Hard	-	Array Bit Manipulation+5
3914. Minimum Operations to Make Array Non Decreasing	Solution	Solve	Medium	-	Array Greedy
3915. Maximum Sum of Alternating Subsequence With Distance at Least K	Solution	Solve	Hard	-	Array Dynamic Programming+1
3916. Number of ZigZag Arrays III	Solution	Solve	Hard	-
3927. Minimize Array Sum Using Divisible Replacements	Solution	Solve	Medium	-	Array Greedy+3
3925. Concatenate Array With Reverse	Solution	Solve	Easy	-	Array Simulation
3918. Sum of Primes Between Number and Its Reverse	Solution	Solve	Medium	-	Math Number Theory
3917. Count Indices With Opposite Parity	Solution	Solve	Easy	-	Array
3920. Maximize Fixed Points After Deletions	Solution	Solve	Hard	-	Array Binary Search+1
3926. Count Valid Word Occurrences	Solution	Solve	Medium	-	Array Counting+2
3919. Minimum Cost to Move Between Indices	Solution	Solve	Medium	-	Array Greedy+1
3921. Score Validator	Solution	Solve	Easy	-	Array Simulation+1
3923. Minimum Generations to Target Point	Solution	Solve	Medium	-	Array Hash Table+1
3922. Minimum Flips to Make Binary String Coherent	Solution	Solve	Medium	-	String
3924. Minimum Threshold Path With Limited Heavy Edges	Solution	Solve	Hard	-	Binary Search Breadth-First Search+1
3928. Minimum Cost to Buy Apples II	Solution	Solve	Hard	-	Array Graph+2
3929. Minimum Partition Score II	Solution	Solve	Hard	-
3930. Power Update After K-th Largest Insertion II	Solution	Solve	Hard	-