README.md

Easy LeetCode-Java-Solutions

S.no	Coding Problem
1	Count Binary Substrings
2	Check if All A's Appears Before All B's
3	Longest Harmonious Subsequence
4	Missing Ranges
5	High Five
6	Binary Tree Tilt
7	Number of Boomerangs
8	Count the Number of Consistent Strings
9	Sentence Similarity
10	Strong Password Checker II
11	Perform String Shifts
12	Kth Largest Element in a Stream
13	Kth Missing Positive Number
14	Check If String Is a Prefix of Array
15	Capitalize the Title
16	The K Weakest Rows in a Matrix
17	Missing Number
18	Remove Duplicates from Sorted Array
19	Implement strStr
20	Reverse String
21	Create Target Array in the Given Order
22	Increasing Order Search Tree
23	Minimum Number of Moves to Seat Everyone
24	Minimum Absolute Difference
25	Maximum 69 Number
26	Largest Perimeter Triangle
27	Minimum Cost of Buying Candies With Discount
28	Number of Equivalent Domino Pairs
29	Summary Ranges
30	Binary Number with Alternating Bits
31	Find the Distinct Difference Array
32	Buy Two Chocolates
33	Intersection of Multiple Arrays
34	Palindrome Linked List
35	Rectangle Overlap
36	Intersection of Three Sorted Arrays
37	Minimum Changes To Make Alternating Binary String
38	Jewels and Stones
39	Number of Valid Words in a Sentence
40	Greatest English Letter in Upper and Lower Case
41	Unique Email Addresses
42	X of a Kind in a Deck of Cards
43	Longest Nice Substring
44	Count Primes
45	Positions of Large Groups
46	Maximum Population Year
47	Min Cost Climbing Stairs
48	Number of Days Between Two Dates
49	Minimum Distance to the Target Element
50	Path Crossing
51	Check If N and Its Double Exist
52	Word Pattern
53	Maximum Nesting Depth of the Parentheses
54	Two Sum IV - Input is a BST
55	Find Positive Integer Solution for a Given Equation
56	Hamming Distance
57	Defuse the Bomb
58	Check if The Number is Fascinating
59	Minimum Common Value
60	Final Prices With a Special Discount in a Shop
61	Plus One
62	Submission Detail
63	Rotate String
64	Minimum Depth of a Binary Tree
65	Power of Four
66	Valid Perfect Square
67	Find N Unique Integers Sum up to Zero
68	Remove Trailing Zeros From a String
69	Paint Fence
70	Detect Capital
71	XOR Operation in an Array
72	Divide a String Into Groups of Size k
73	Flipping an Image
74	Subtract the Product and Sum of Digits of an Integer
75	Two Sum III - Data Structure Design
76	Check if Binary String Has at Most One Segment of Ones
77	Number Complement
78	Longer Contiguous Segments of Ones than Zeros
79	Design HashSet
80	Convert 1D Array Into 2D Array
81	Odd String Difference
82	Remove Digit From Number to Maximize Result
83	Find Mode in Binary Search Tree
84	Count Hills and Valleys in an Array
85	Maximum Repeating Substring
86	Number of Unequal Triplets in Array
87	Split Strings by Separator
88	Find Closest Number to Zero
89	1-bit and 2-bit Characters
90	Binary Gap
91	Subtree of Another Tree
92	Binary Tree Level Order Traversal II
93	Count Prefixes of a Given String
94	Find the Width of Columns of a Grid
95	Defanging an IP Address
96	Find Target Indices After Sorting Array
97	Truncate Sentence
98	Diameter of Binary Tree
99	Best Poker Hand
100	Range Sum of BST
101	Maximum Average Subarray I
102	Fizz Buzz
103	Check if All the Integers in a Range Are Covered
104	Find First Palindromic String in the Array
105	Duplicate Zeros
106	Minimum Subsequence in Non-Increasing Order
107	Smallest Range I
108	Employee Importance
109	Minimum_index_sum_of_two_lists
110	Points That Intersect With Cars
111	Number of segments in a String
112	Delete Columns to Make Sorted
113	Reverse Only Letters
114	Evaluate Boolean Binary Tree
115	Repeated String Match
116	Neither Minimum nor Maximum
117	Maximum Value of an Ordered Triplet I
118	Uncommon Words from Two Sentences
119	Assign Cookies
120	Most Frequent Number Following Key In an Array
121	Element Appearing More Than 25% In Sorted Array
122	Find the Town Judge
123	Buddy Strings
124	Teoplitz Matrix
125	Leaf-Similar Trees
126	Minimum Hours of Training to Win a Competition
127	Goat Latin
128	Flower Planting With No Adjacent
129	Largest Triangle Area
130	Row With Maximum Ones
131	Determine Color of a Chessboard Square
132	Richest Customer Wealth
133	Consecutive Characters
134	Latest Time by Replacing Hidden Digits
135	Robot Return to Origin
136	Determine Whether Matrix Can Be Obtained By Rotation
137	Flip Game
138	Minimum Value to Get Positive Step by Step Sum
139	Average Value of Even Numbers That Are Divisible by Three
140	Reshape the matrix
141	Valid Anagram
142	Number of Strings That Appear as Substrings in Word
143	DI String Match
144	Running Sum of 1d Array
145	Special Array With X Elements Greater Than or Equal X
146	Number of Distinct Averages
147	Check if an Array Is Consecutive
148	Backspace String Compare
149	Rings and Rods
150	Implement Stack using Queues
151	Baseball Game
152	Pairs of Songs With Total Durations Divisible by 60
153	Destination City
154	Maximum Product of Three Numbers
155	Three Consecutive Odds
156	Set Mismatch
157	Sort Array by Increasing Frequency
158	Find the Distance Value Between Two Arrays
159	Find Anagram Mappings
160	Check if Array is Good
161	Decompress Run-Length Encoded List
162	Flood Fill
163	Magic Squares In Grid
164	Smallest Even Multiple
165	Hexspeak
166	Diet Plan Performance
167	Maximum Number of Balloons
168	Find Smallest Letter Greater Than Target
169	Check if Array Is Sorted and Rotated
170	Maximum Enemy Forts That Can Be Captured
171	Path Sum
172	Day of the Year
173	Number of Beautiful Pairs
174	Can Make Arithmetic Progression From Sequence
175	Furthest Point From Origin
176	Find the Highest Altitude
177	Root Equals Sum of Children
178	Powerful Integers
179	Merge Two Sorted Lists
180	Binary Search
181	K-diff Pairs in an Array
182	Repeated Substring Pattern
183	Calculate Digit Sum of a String
184	Reformat Phone Number
185	Longest Continuous Increasing Subsequence
186	Shuffle the Array
187	Count Pairs Of Similar Strings
188	Ransom Note
189	trailing_zeroes
190	Height Checker
191	License Key Formatting
192	Sum of Values at Indices With K Set Bits
193	Balanced Binary Tree
194	Check If It Is a Straight Line
195	Binary Watch
196	Count Special Quadruplets
197	Three Divisors
198	Make Array Zero by Subtracting Equal Amounts
199	Maximum Number of Words You Can Type
200	Contains Duplicate
201	Decode the Message
202	String Matching in an Array
203	Count the Digits That Divide a Number
204	Distance Between Bus Stops
205	Ugly Number
206	Faulty Keyboard
207	Find the Pivot Integer
208	Pascal's Triangle II
209	Maximum Count of Positive Integer and Negative Integer
210	Count Symmetric Integers
211	Pascal's Triangle
212	Binary Prefix Divisible By 5
213	Number Of Rectangles That Can Form The Largest Square
214	Separate the Digits in an Array
215	Count Negative Numbers in a Sorted Matrix
216	Remove One Element to Make the Array Strictly Increasing
217	Two Furthest Houses With Different Colors
218	Special Positions in a Binary Matrix
219	Check if All Characters Have Equal Number of Occurrences
220	Valid Word Sequence
221	Counting Words With a Given Prefix
222	Binary Tree Inorder Traversal
223	Minimum Moves to Convert String
224	Design Linked List
225	Kth Distinct String in an Array
226	Count Good Triplets
227	Design an Ordered System
228	Get Maximum in Generated Array
229	Convert the Temperature
230	Arranging Coins
231	Count Pairs Whose Sum is Less than Target
232	Check if Word Equals Summation of Two Words
233	Fair Candy Swap
234	Design Parking System
235	Transpose Matrix
236	Delete Greatest Value in Each Row
237	Excel Sheet Column Title
238	First Letter to Appear Twice
239	Linked List Cycle
240	Find All the Lonely Nodes
241	Find the Maximum Achievable Number
242	Base 7
243	Reverse Bits
244	SqrtX
245	Check if Strings Can be Made Equal With Operations I
246	Similar RGB Color
247	Sort the People
248	Is Subsequence
249	Longest Even Odd Subarray With Threshold
250	Reverse Linked List
251	Shortest Distance to a Character
252	Count of Matches in Tournament
253	Valid Parentheses
254	Convert Sorted Array To Binary Search Tree
255	Count Vowel Substrings of a String
256	Construct the rectangle
257	Maximum Units on a Truck
258	Sum of Left Leaves
259	Decrypt String from Alphabet to Integer Mapping
260	Number of Employees Who Met the Target
261	Find Pivot Index
262	Factorial Trailing Zeroes
263	Build an Array With Stack Operations
264	Last Stone Weight
265	range_addition_II
266	Isomorphic Strings
267	Longest Subsequence With Limited Sum
268	Split a String in Balanced Strings
269	To Lower Case
270	Sum of Digits of String After Convert
271	Number of Senior Citizens
272	Minimum Cost to Move Chips to The Same Position
273	Read N characters Given Read4
274	Longest Alternating Subarray
275	Delete N Nodes After M Nodes of a Linked List
276	Count Items Matching a Rule
277	Reverse Vowels of a String
278	Largest Local Values in a Matrix
279	A Number After a Double Reversal
280	Roman to Integer
281	Cousins in Binary Tree
282	Binary Tree Paths
283	Complement of Base 10 Integer
284	Find if Path Exists in Graph
285	Minimum Difference Between Highest and Lowest of K Scores
286	Number of Days in a Month
287	Find Resultant Array After Removing Anagrams
288	Minimum String Length After Removing Substrings
289	Palindrome Number
290	Find Subarrays With Equal Sum
291	Account Balance After Rounded Purchase
292	Minimum Amount of Time to Fill Cups
293	Detect Pattern of Length M Repeated K or More Times
294	Largest Positive Integer That Exists With Its Negative
295	Univalued Binary Tree
296	Single-Row Keyboard
297	Remove Linked List Elements
298	How Many Numbers Are Smaller Than the Current Number
299	Most Frequent Even Element
300	Maximum Odd Binary Number
301	Armstrong Number
302	Counting Elements
303	Make The String Great
304	Cells with Odd Values in a Matrix
305	Power of Two
306	Decode XORed Array
307	Long Pressed Name
308	Kids With the Greatest Number of Candies
309	N-ary Tree Postorder Traversal
310	Max Consecutive Ones
311	Find Words That Can Be Formed by Characters
312	Number of 1 bits
313	Largest Unique Number
314	The Employee That Worked on the Longest Task
315	Paint House
316	Logger Rate Limiter
317	Substrings of Size Three with Distinct Characters
318	Maximum Difference by Remapping a Digit
319	Monotonic Array
320	Check if One String Swap Can Make Strings Equal
321	Valid Palindrome II
322	Occurrences After Bigram
323	Minimum Sum of Four Digit Number After Splitting Digits
324	Move Zeroes
325	Number of Arithmetic Triplets
326	Count Number of Pairs With Absolute Difference K
327	Number of Lines To Write String
328	First Unique Character in a String
329	Maximum depth of Binary tree
330	Largest Number At Least Twice of Others
331	Reverse String II
332	Letter Case Permutation
333	Two Sum
334	Climbing Stairs
335	Projection Area of 3D Shapes
336	Maximize Sum Of Array After K Negations
337	Third Maximum Number
338	Sign of the Product of an Array
339	Heaters
340	Remove Palindromic Subsequences
341	Time Needed to Buy Tickets
342	Find the K-Beauty of a Number
343	Find All K-Distant Indices in an Array
344	Student Attendance Record I
345	Delete Characters to Make Fancy String
346	Longest Uncommon Subsequence
347	Check Distances Between Same Letters
348	Valid Mountain Array
349	Shortest Word Distance
350	Check if String Is Decomposable Into Value-Equal Substrings
351	Matrix Cells in Distance Order
352	Final Value of Variable After Performing Operations
353	Shuffle String
354	Sum of Square Numbers
355	Percentage of Letter in String
356	Intersection of Two Arrays II
357	Most Common Word
358	Count Asterisks
359	Sum of Squares of Special Elements
360	Largest 3-Same-Digit Number in String
361	Number of Students Doing Homework at a Given Time
362	Invert Binary Tree
363	Check if the Sentence Is Pangram
364	Island Perimeter
365	Available Captures for Rook
366	Count Common Words With One Occurrence
367	Degree of an array
368	Sum of Root To Leaf Binary Numbers
369	Circular Sentence
370	Sort Array By Parity
371	Number of Good Pairs
372	Convert a number to hexadecimal
373	Check If a Word Occurs As a Prefix of Any Word in a Sentence
374	Calculate Delayed Arrival Time
375	Concatenation of Array
376	Number of Recent Calls
377	Fixed Point
378	Valid Boomerang
379	Minimum Moves to Equal an Array Element
380	Calculate Money in Leetcode Bank
381	Check If Two String Arrays are Equivalent
382	Find Nearest Point That Has the Same X or Y Coordinate
383	Maximum Product Difference Between Two Pairs
384	Goal Parser Interpretation
385	Find the Losers of the Circular Game
386	Judge Route Cycle
387	K Items With the Maximum Sum
388	Middle of the linked list
389	Maximum Number of Pairs in Array
390	Check if Matrix Is X-Matrix
391	Compare Strings by Frequency of the Smallest Character
392	Intersection of Two Arrays
393	Bulls and Cows
394	Slowest Key
395	Count Equal and Divisible Pairs in an Array
396	nim_game
397	Min Max Game
398	Groups of Special-Equivalent Strings
399	Reformat The String
400	Minimum Number of Operations to Convert Time
401	Form Smallest Number From Two Digit Arrays
402	Minimum Operations to Collect Elements
403	Count Elements With Strictly Smaller and Greater Elements
404	Determine the Winner of a Bowling Game
405	Minimum Operations to Make the Array Increasing
406	Minimum Right Shifts to Sort the Array
407	Index Pairs of a String
408	Number of Steps to Reduce a Number to Zero
409	Confusing Number
410	Convert BST to Greater Tree
411	Find All Numbers Disappeared in an Array
412	Largest Number After Digit Swaps by Parity
413	Merge Two 2D Arrays by Summing Values
414	Reformat Date
415	Largest Odd Number in String
416	Build Array from Permutation
417	Find Lucky Integer in an Array
418	Reverse Prefix of Word
419	Nested List Weight Sum
420	Relative ranks
421	Palindrome Permutation
422	Find Winner on a Tic Tac Toe Game
423	Merge two binary trees
424	Check if Numbers Are Ascending in a Sentence
425	Power of Three
426	Remove Letter To Equalize Frequency
427	Lemonade Change
428	Length of last word
429	Increasing Decreasing String
430	N-th Tribonacci Number
431	Longest Common Prefix
432	Minimum Time Visiting All Points
433	Calculate Amount Paid in Taxes
434	Number of Different Integers in a String
435	Minimize String Length
436	Add Strings
437	Maximum Ascending Subarray Sum
438	Best Time to Buy and Sell Stock
439	Lowest Common Ancestor of a Binary Search Tree
440	Determine if String Halves Are Alike
441	Find the difference
442	Check if Every Row and Column Contains All Numbers
443	Replace All Digits with Characters
444	Largest Substring Between Two Equal Characters
445	Strobogrammatic Number
446	Rearrange Characters to Make Target String
447	Next Greater Element I
448	Counting Bits
449	Remove Outermost Parentheses
450	Count the Number of Vowel Strings in Range
451	Determine if Two Events Have Conflict
452	Replace All ?'s to Avoid Consecutive Repeating Characters
453	Two Sum Less Than K
454	Majority Element
455	Merge Sorted Array
456	Unique Morse Code Words
457	Divisor Game
458	Find Numbers with Even Number of Digits
459	Categorize Box According to Criteria
460	Implement Queue using Stacks
461	N-ary Tree Preorder Traversal
462	Smallest Index With Equal Value
463	Total Distance Traveled
464	Delete Node in a Linked List
465	Sort Array By Parity II
466	Most Visited Sector in a Circular Track
467	Greatest Common Divisor of Strings
468	Remove Element
469	Maximum Subarray Sum I
470	Partition Array Into Three Parts With Equal Sum
471	Remove Duplicates From Sorted Lists
472	Minimum Bit Flips to Convert Number
473	Sort Even and Odd Indices Independently
474	Meeting Rooms
475	Crawler Log Folder
476	Maximum Difference Between Increasing Elements
477	Left and Right Sum Differences
478	Find the Middle Index in Array
479	Range Sum Query Immutable
480	Intersection of two Linked Lists
481	Merge Similar Items
482	Can Place Flowers
483	Generate a String With Characters That Have Odd Counts
484	Count Operations to Obtain Zero
485	Array Partition I
486	Next Greater Element
487	Perfect Number
488	Sum of Digits in the Minimum Number
489	Guess Number Higher or Lower
490	Find the Array Concatenation Value
491	Self Dividing Number
492	Design HashMap
493	Minimum Time to Type Word Using Special Typewriter
494	Check Whether Two Strings are Almost Equivalent
495	Shortest Distance to Target String in a Circular Array
496	Cells in a Range on an Excel Sheet
497	Number of Common Factors
498	Keep Multiplying Found Values by Two
499	Search in a Binary Search Tree
500	Count Largest Group
501	Sum of Unique Elements
502	Moving Average from Data Stream
503	Symmetric Tree
504	Maximum Product of Two Elements in an Array
505	Difference Between Element Sum and Digit Sum of an Array
506	Find Common Characters
507	Lucky Numbers in a Matrix
508	Remove Vowels from a String
509	Add Digits
510	Teemo Attacking
511	Contains Duplicate II
512	Count Integers With Even Digit Sum
513	Minimum Index Sum of Two Lists
514	Two Out of Three
515	Closest Binary Search Tree Value
516	Distribute Money to Maximum Children
517	Sum of Digits in Base K
518	Fibonacci Number
519	Distribute Candies to People
520	Valid Word Square
521	Distribute Candies
522	Check If a Number Is Majority Element in a Sorted Array
523	Alternating Digit Sum
524	Take Gifts From the Richest Pile
525	Verifying an Alien Dictionary
526	Longest Palindrome
527	Sum of All Odd Length Subarrays
528	Average Salary Excluding the Minimum and Maximum Salary
529	Apply Operations to an Array
530	Single Number
531	Keyboard Row
532	Count Distinct Numbers on Board
533	Squares of a Sorted Array
534	Find the Longest Balanced Substring of a Binary String
535	Binary Tree Postorder Traversal
536	Rearrange Spaces Between Words
537	Minimum Recolors to Get K Consecutive Black Blocks
538	Count Square Sum Triples
539	Maximum Distance in Arrays
540	Unique Number of Occurrences
541	Day of the Week
542	Design an Ordered Stream
543	Minimum Distance Between BST Nodes
544	Maximum Sum With Exactly K Elements
545	Number of Students Unable to Eat Lunch
546	Check if Number Has Equal Digit Count and Digit Value
547	Sum Of Two Integers
548	Check if a String Is an Acronym of Words
549	Search Insert Position
550	Max Pair Sum in an Array
551	Longest Univalue Path
552	Maximum Depth of N-ary Tree
553	Thousand Separator
554	Add Binary
555	Convert Binary Number in a Linked List to Integer
556	Sorting the Sentence
557	Replace Elements with Greatest Element on Right Side
558	Matrix Diagonal Sum
559	Check Array Formation Through Concatenation
560	Water Bottles
561	Add to Array-Form of Integer
562	Prime In Diagonal
563	Pass the Pillow
564	Missing Number In Arithmetic Progression
565	Divide Array Into Equal Pairs
566	Maximum Value of a String in an Array
567	Maximum Number of Balls in a Box
568	Mean of Array After Removing Some Elements
569	N-Repeated Element in Size 2N Array
570	Redistribute Characters to Make All Strings Equal
571	Remove All Adjacent Duplicates In String
572	Minimum Absolute Difference in BST
573	Image Smoother
574	Find the Difference of Two Arrays
575	How Many Apples Can You Put into the Basket
576	Second Minimum Node in a binary tree
577	Excel Sheet Column Number
578	Same Tree
579	Count Odd Numbers in an Interval Range
580	String Without AAA or BBB
581	Find Greatest Common Divisor of Array
582	Longest Word in Dictionary
583	Happy Number
584	Array Transformation
585	Design Compressed String Iterator
586	Reverse words in a String III
587	Rank Transform of an Array
588	First Bad Version
589	Sort Integers by The Number of 1 Bits
590	Split With Minimum Sum
591	Construct String from Binary Tree
592	Maximum Number of Words Found in Sentences
593	Toeplitz Matrix
594	Find Maximum Number of String Pairs
595	Finding 3-Digit Even Numbers
596	Valid Word Abbreviation
597	Second Largest Digit in a String
598	Valid Palindrome
599	Relative Sort Array
600	Minimum Cuts to Divide a Circle
601	Path In Zigzag Labelled Binary Tree
602	Shortest Completing Word
603	Nim Game
604	Count Substrings with Only One Distinct Letter
605	Average of Levels in Binary Tree
606	Merge Strings Alternately