Easy LeetCode Problems: Page 3 of 4

Problems 401 to 600 of the 760 Easy-rated problems in this library, continuing the list on the Easy hub.

Page 3 of 4

Easy problems, page 3
No.	Problem	Topics
2016	Maximum Difference Between Increasing Elements	Array
2022	Convert 1D Array Into 2D Array	Array, Matrix, Simulation
2027	Minimum Moves to Convert String	Greedy, String
2032	Two Out of Three	Bit Manipulation, Array, Hash Table
2037	Minimum Number of Moves to Seat Everyone	Greedy, Array, Counting Sort +1
2042	Check if Numbers Are Ascending in a Sentence	String
2047	Number of Valid Words in a Sentence	String
2053	Kth Distinct String in an Array	Array, Hash Table, String +1
2057	Smallest Index With Equal Value	Array
2062	Count Vowel Substrings of a String	Hash Table, String
2068	Check Whether Two Strings are Almost Equivalent	Hash Table, String, Counting
2073	Time Needed to Buy Tickets	Queue, Array, Simulation
2078	Two Furthest Houses With Different Colors	Greedy, Array
2085	Count Common Words With One Occurrence	Array, Hash Table, String +1
2089	Find Target Indices After Sorting Array	Array, Binary Search, Sorting
2094	Finding 3-Digit Even Numbers	Recursion, Array, Hash Table +2
2099	Find Subsequence of Length K With the Largest Sum	Array, Hash Table, Sorting +1
2103	Rings and Rods	Hash Table, String
2108	Find First Palindromic String in the Array	Array, Two Pointers, String
2114	Maximum Number of Words Found in Sentences	Array, String
2119	A Number After a Double Reversal	Math
2124	Check if All A's Appears Before All B's	String
2129	Capitalize the Title	String
2133	Check if Every Row and Column Contains All Numbers	Array, Hash Table, Matrix
2138	Divide a String Into Groups of Size k	String, Simulation
2144	Minimum Cost of Buying Candies With Discount	Greedy, Array, Sorting
2148	Count Elements With Strictly Smaller and Greater Elements	Array, Counting, Sorting
2154	Keep Multiplying Found Values by Two	Array, Hash Table, Sorting +1
2160	Minimum Sum of Four Digit Number After Splitting Digits	Greedy, Math, Sorting
2164	Sort Even and Odd Indices Independently	Array, Sorting
2169	Count Operations to Obtain Zero	Math, Simulation
2176	Count Equal and Divisible Pairs in an Array	Array
2180	Count Integers With Even Digit Sum	Math, Simulation
2185	Counting Words With a Given Prefix	Array, String, String Matching
2190	Most Frequent Number Following Key In an Array	Array, Hash Table, Counting
2194	Cells in a Range on an Excel Sheet	String
2200	Find All K-Distant Indices in an Array	Array, Two Pointers
2206	Divide Array Into Equal Pairs	Bit Manipulation, Array, Hash Table +1
2210	Count Hills and Valleys in an Array	Array
2215	Find the Difference of Two Arrays	Array, Hash Table
2220	Minimum Bit Flips to Convert Number	Bit Manipulation
2224	Minimum Number of Operations to Convert Time	Greedy, String
2231	Largest Number After Digit Swaps by Parity	Sorting, Heap (Priority Queue)
2235	Add Two Integers	Math
2236	Root Equals Sum of Children	Tree, Binary Tree
2239	Find Closest Number to Zero	Array
2243	Calculate Digit Sum of a String	String, Simulation
2248	Intersection of Multiple Arrays	Array, Hash Table, Counting +1
2255	Count Prefixes of a Given String	Array, String
2259	Remove Digit From Number to Maximize Result	Greedy, String, Enumeration
2264	Largest 3-Same-Digit Number in String	String
2269	Find the K-Beauty of a Number	Math, String, Sliding Window
2273	Find Resultant Array After Removing Anagrams	Array, Hash Table, String +1
2278	Percentage of Letter in String	String
2283	Check if Number Has Equal Digit Count and Digit Value	Hash Table, String, Counting
2287	Rearrange Characters to Make Target String	Hash Table, String, Counting
2293	Min Max Game	Array, Simulation
2299	Strong Password Checker II	String
2303	Calculate Amount Paid in Taxes	Array, Simulation
2309	Greatest English Letter in Upper and Lower Case	Hash Table, String, Enumeration
2315	Count Asterisks	String
2319	Check if Matrix Is X-Matrix	Array, Matrix
2325	Decode the Message	Hash Table, String
2331	Evaluate Boolean Binary Tree	Tree, Depth-First Search, Binary Tree
2335	Minimum Amount of Time to Fill Cups	Greedy, Array, Sorting +1
2341	Maximum Number of Pairs in Array	Array, Hash Table, Counting
2347	Best Poker Hand	Array, Hash Table, Counting
2351	First Letter to Appear Twice	Bit Manipulation, Hash Table, String +1
2357	Make Array Zero by Subtracting Equal Amounts	Greedy, Array, Hash Table +3
2363	Merge Similar Items	Array, Hash Table, Ordered Set +1
2367	Number of Arithmetic Triplets	Array, Hash Table, Two Pointers +1
2373	Largest Local Values in a Matrix	Array, Matrix
2379	Minimum Recolors to Get K Consecutive Black Blocks	String, Sliding Window
2383	Minimum Hours of Training to Win a Competition	Greedy, Array
2389	Longest Subsequence With Limited Sum	Greedy, Array, Binary Search +2
2395	Find Subarrays With Equal Sum	Array, Hash Table
2399	Check Distances Between Same Letters	Array, Hash Table, String
2404	Most Frequent Even Element	Array, Hash Table, Counting
2409	Count Days Spent Together	Math, String
2413	Smallest Even Multiple	Math, Number Theory
2418	Sort the People	Array, Hash Table, String +1
2423	Remove Letter To Equalize Frequency	Hash Table, String, Counting
2427	Number of Common Factors	Math, Enumeration, Number Theory
2432	The Employee That Worked on the Longest Task	Array
2437	Number of Valid Clock Times	String, Enumeration
2441	Largest Positive Integer That Exists With Its Negative	Array, Hash Table, Two Pointers +1
2446	Determine if Two Events Have Conflict	Array, String
2451	Odd String Difference	Array, Hash Table, String
2455	Average Value of Even Numbers That Are Divisible by Three	Array, Math
2460	Apply Operations to an Array	Array, Two Pointers, Simulation
2465	Number of Distinct Averages	Array, Hash Table, Two Pointers +1
2469	Convert the Temperature	Math
2475	Number of Unequal Triplets in Array	Array, Hash Table, Sorting
2481	Minimum Cuts to Divide a Circle	Geometry, Math
2485	Find the Pivot Integer	Math, Prefix Sum
2490	Circular Sentence	String
2496	Maximum Value of a String in an Array	Array, String
2500	Delete Greatest Value in Each Row	Array, Matrix, Sorting +2
2506	Count Pairs Of Similar Strings	Bit Manipulation, Array, Hash Table +2
2511	Maximum Enemy Forts That Can Be Captured	Array, Two Pointers
2515	Shortest Distance to Target String in a Circular Array	Array, String
2520	Count the Digits That Divide a Number	Math
2525	Categorize Box According to Criteria	Math
2529	Maximum Count of Positive Integer and Negative Integer	Array, Binary Search, Counting
2535	Difference Between Element Sum and Digit Sum of an Array	Array, Math
2540	Minimum Common Value	Array, Hash Table, Two Pointers +1
2544	Alternating Digit Sum	Math
2549	Count Distinct Numbers on Board	Array, Hash Table, Math +1
2553	Separate the Digits in an Array	Array, Simulation
2558	Take Gifts From the Richest Pile	Array, Simulation, Heap (Priority Queue)
2562	Find the Array Concatenation Value	Array, Two Pointers, Simulation
2566	Maximum Difference by Remapping a Digit	Greedy, Math
2570	Merge Two 2D Arrays by Summing Values	Array, Hash Table, Two Pointers
2574	Left and Right Sum Differences	Array, Prefix Sum
2578	Split With Minimum Sum	Greedy, Math, Sorting
2582	Pass the Pillow	Math, Simulation
2586	Count the Number of Vowel Strings in Range	Array, String, Counting
2591	Distribute Money to Maximum Children	Greedy, Math
2595	Number of Even and Odd Bits	Bit Manipulation
2600	K Items With the Maximum Sum	Greedy, Math
2605	Form Smallest Number From Two Digit Arrays	Array, Hash Table, Enumeration
2609	Find the Longest Balanced Substring of a Binary String	String
2614	Prime In Diagonal	Array, Math, Matrix +1
2639	Find the Width of Columns of a Grid	Array, Matrix
2643	Row With Maximum Ones	Array, Matrix
2644	Find the Maximum Divisibility Score	Array
2651	Calculate Delayed Arrival Time	Math
2652	Sum Multiples	Math
2656	Maximum Sum With Exactly K Elements	Greedy, Array
2660	Determine the Winner of a Bowling Game	Array, Simulation
2670	Find the Distinct Difference Array	Array, Hash Table
2678	Number of Senior Citizens	Array, String
2682	Find the Losers of the Circular Game	Array, Hash Table, Simulation
2696	Minimum String Length After Removing Substrings	Stack, String, Simulation
2697	Lexicographically Smallest Palindrome	Greedy, Two Pointers, String
2706	Buy Two Chocolates	Greedy, Array, Sorting
2710	Remove Trailing Zeros From a String	String
2716	Minimize String Length	Hash Table, String
2717	Semi-Ordered Permutation	Array, Simulation
2729	Check if The Number is Fascinating	Hash Table, Math
2733	Neither Minimum nor Maximum	Array, Sorting
2739	Total Distance Traveled	Math, Simulation
2744	Find Maximum Number of String Pairs	Array, Hash Table, String +1
2748	Number of Beautiful Pairs	Array, Hash Table, Math +2
2760	Longest Even Odd Subarray With Threshold	Array, Sliding Window
2765	Longest Alternating Subarray	Array, Enumeration
2769	Find the Maximum Achievable Number	Math
2778	Sum of Squares of Special Elements	Array, Enumeration
2784	Check if Array is Good	Array, Hash Table, Sorting
2788	Split Strings by Separator	Array, String
2798	Number of Employees Who Met the Target	Array
2806	Account Balance After Rounded Purchase	Math
2810	Faulty Keyboard	String, Simulation
2815	Max Pair Sum in an Array	Array, Hash Table
2824	Count Pairs Whose Sum is Less than Target	Array, Two Pointers, Binary Search +1
2828	Check if a String Is an Acronym of Words	Array, String
2833	Furthest Point From Origin	String, Counting
2839	Check if Strings Can be Made Equal With Operations I	String
2843	Count Symmetric Integers	Math, Enumeration
2848	Points That Intersect With Cars	Array, Hash Table, Prefix Sum
2855	Minimum Right Shifts to Sort the Array	Array
2859	Sum of Values at Indices With K Set Bits	Bit Manipulation, Array
2864	Maximum Odd Binary Number	Greedy, Math, String
2869	Minimum Operations to Collect Elements	Bit Manipulation, Array, Hash Table
2873	Maximum Value of an Ordered Triplet I	Array
2877	Create a DataFrame from List	Pandas
2894	Divisible and Non-divisible Sums Difference	Math
2899	Last Visited Integers	Array, Simulation
2900	Longest Unequal Adjacent Groups Subsequence I	Greedy, Array, String +1
2903	Find Indices With Index and Value Difference I	Array, Two Pointers
2908	Minimum Sum of Mountain Triplets I	Array
2913	Subarrays Distinct Element Sum of Squares I	Array, Hash Table
2917	Find the K-or of an Array	Bit Manipulation, Array
2923	Find Champion I	Array, Matrix
2928	Distribute Candies Among Children I	Math, Combinatorics, Enumeration
2932	Maximum Strong Pair XOR I	Bit Manipulation, Trie, Array +2
2937	Make Three Strings Equal	String
2942	Find Words Containing Character	Array, String
2946	Matrix Similarity After Cyclic Shifts	Array, Math, Matrix +1
2951	Find the Peaks	Array, Enumeration
2956	Find Common Elements Between Two Arrays	Array, Hash Table
2960	Count Tested Devices After Test Operations	Array, Counting, Simulation
2965	Find Missing and Repeated Values	Array, Hash Table, Math +1
2970	Count the Number of Incremovable Subarrays I	Array, Two Pointers, Binary Search +1
2974	Minimum Number Game	Array, Sorting, Simulation +1
2980	Check if Bitwise OR Has Trailing Zeros	Bit Manipulation, Array
2996	Smallest Missing Integer Greater Than Sequential Prefix Sum	Array, Hash Table, Sorting
3000	Maximum Area of Longest Diagonal Rectangle	Array
0157	Read N Characters Given Read4Premium	Array, Interactive, Simulation
0163	Missing RangesPremium	Array
0170	Two Sum III - Data structure designPremium	Design, Array, Hash Table +2
0243	Shortest Word DistancePremium	Array, String
0246	Strobogrammatic NumberPremium	Hash Table, Two Pointers, String
0252	Meeting RoomsPremium	Array, Sorting
0266	Palindrome PermutationPremium	Bit Manipulation, Hash Table, String
0270	Closest Binary Search Tree ValuePremium	Tree, Depth-First Search, Binary Search Tree +2
0293	Flip GamePremium	String
0346	Moving Average from Data StreamPremium	Design, Queue, Array +1
0359	Logger Rate LimiterPremium	Design, Hash Table, Data Stream
0408	Valid Word AbbreviationPremium	Two Pointers, String

Problems with a complete Python solution are listed first, then by ascending problem number. Or go by technique instead: all LeetCode patterns.