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A collection of Java solutions for various LeetCode problems that i have solved

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1 two sum 532091433e064c7c9b7bbaec7a97d93f.md
1 two sum 532091433e064c7c9b7bbaec7a97d93f.md
 
 
1021 Remove Outermost Parentheses 7d070d4b213c49678d18bac7d53fa719.md
1021 Remove Outermost Parentheses 7d070d4b213c49678d18bac7d53fa719.md
 
 
1048 Longest String Chain 389969a9814b4bbebb7eaf0f3fc095f1.md
1048 Longest String Chain 389969a9814b4bbebb7eaf0f3fc095f1.md
 
 
1089 Duplicate Zeros 1ee0b15176984a16850b56306a78d3ef.md
1089 Duplicate Zeros 1ee0b15176984a16850b56306a78d3ef.md
 
 
1108 Defanging an IP Address 264057d2de6d48ac8d3b78020b6097e0.md
1108 Defanging an IP Address 264057d2de6d48ac8d3b78020b6097e0.md
 
 
118 Pascal's Triangle be080e0ebfd9400f9366a27cf5077f05.md
118 Pascal's Triangle be080e0ebfd9400f9366a27cf5077f05.md
 
 
119 Pascal's Triangle II 9eb51128db714c84bf83704a5ec1cb55.md
119 Pascal's Triangle II 9eb51128db714c84bf83704a5ec1cb55.md
 
 
12 Integer to Roman 4eb642456f43406d954901d58cf68c05.md
12 Integer to Roman 4eb642456f43406d954901d58cf68c05.md
 
 
1207. Unique Number of Occurrences.md
1207. Unique Number of Occurrences.md
 
 
121. Best Time to Buy and Sell Stock.md
121. Best Time to Buy and Sell Stock.md
 
 
125 Valid Palindrome a2f11f3da5ce483cbb155b52ffe5ea1d.md
125 Valid Palindrome a2f11f3da5ce483cbb155b52ffe5ea1d.md
 
 
1275 Find Winner on a Tic Tac Toe Game 3c10870953ab4a48b23c3b0196fa668b.md
1275 Find Winner on a Tic Tac Toe Game 3c10870953ab4a48b23c3b0196fa668b.md
 
 
128 Longest Consecutive Sequence d9151fe3b12144a0ab63ba291557062c.md
128 Longest Consecutive Sequence d9151fe3b12144a0ab63ba291557062c.md
 
 
1299 Replace Elements with Greatest Element on Rig f143e66f79b34fafb61b99ff55023bc6.md
1299 Replace Elements with Greatest Element on Rig f143e66f79b34fafb61b99ff55023bc6.md
 
 
13 Roman to Integer 1a15ded0a7a44c758556671b16c0b897.md
13 Roman to Integer 1a15ded0a7a44c758556671b16c0b897.md
 
 
1337 The K Weakest Rows in a Matrix 5555a7c8fcb8441a9592c8a5a2a61913.md
1337 The K Weakest Rows in a Matrix 5555a7c8fcb8441a9592c8a5a2a61913.md
 
 
1347. Minimum Number of Steps to Make Two Strings Anagram.md
1347. Minimum Number of Steps to Make Two Strings Anagram.md
 
 
136 Single Number f5e41a762f3f4aad86d3a6bda59defdc.md
136 Single Number f5e41a762f3f4aad86d3a6bda59defdc.md
 
 
14 Longest Common Prefix 27cc704b880c45b39ca9bd3650395956.md
14 Longest Common Prefix 27cc704b880c45b39ca9bd3650395956.md
 
 
1480 Running Sum of 1d Array e5f0539adb534d1b8fcc76e507b38b00.md
1480 Running Sum of 1d Array e5f0539adb534d1b8fcc76e507b38b00.md
 
 
1491 Average Salary Excluding the Minimum and Maxi 62c9fa58b6694466b553186adcf68859.md
1491 Average Salary Excluding the Minimum and Maxi 62c9fa58b6694466b553186adcf68859.md
 
 
1496. Path Crossing.md
1496. Path Crossing.md
 
 
150. Evaluate Reverse Polish Notation.md
150. Evaluate Reverse Polish Notation.md
 
 
1502 Can Make Arithmetic Progression From Sequence 514c47a9b05845e0853456a01d79e357.md
1502 Can Make Arithmetic Progression From Sequence 514c47a9b05845e0853456a01d79e357.md
 
 
1512 Number of Good Pairs 479e668e5b754b23896f555dfd957163.md
1512 Number of Good Pairs 479e668e5b754b23896f555dfd957163.md
 
 
1523 Count Odd Numbers in an Interval Range b06882dd230347c4a1f64668ba1a0dc4.md
1523 Count Odd Numbers in an Interval Range b06882dd230347c4a1f64668ba1a0dc4.md
 
 
1535. Find the Winner of an Array Game.md
1535. Find the Winner of an Array Game.md
 
 
1572 Matrix Diagonal Sum 432349ca64bc48b2bec83abe49382fbb.md
1572 Matrix Diagonal Sum 432349ca64bc48b2bec83abe49382fbb.md
 
 
1603 Design Parking System 2321960382954dd7aa950e11f2ad1f8d.md
1603 Design Parking System 2321960382954dd7aa950e11f2ad1f8d.md
 
 
1657. Determine if Two Strings Are Close.md
1657. Determine if Two Strings Are Close.md
 
 
167 Two Sum II - Input Array Is Sorted 2d953aa8f6314659abba61782c6cb983.md
167 Two Sum II - Input Array Is Sorted 2d953aa8f6314659abba61782c6cb983.md
 
 
169 Majority Element ee712db24f8b419087e7c34d539962d6.md
169 Majority Element ee712db24f8b419087e7c34d539962d6.md
 
 
1704. Determine if String Halves Are Alike.md
1704. Determine if String Halves Are Alike.md
 
 
20 Valid Parentheses 2a77b16b88924572a0af9a8cf99464e2.md
20 Valid Parentheses 2a77b16b88924572a0af9a8cf99464e2.md
 
 
202. Happy Number.md
202. Happy Number.md
 
 
205. Isomorphic Strings.md
205. Isomorphic Strings.md
 
 
206 Reverse Linked List 181d5a1a12c0452594256fbd276cbb10.md
206 Reverse Linked List 181d5a1a12c0452594256fbd276cbb10.md
 
 
217 Contains Duplicate 8b55c0fb490a458fbecfbaf258ce6630.md
217 Contains Duplicate 8b55c0fb490a458fbecfbaf258ce6630.md
 
 
225 Implement Stack using Queues 9228427e285b482e9cc3903d658b1704.md
225 Implement Stack using Queues 9228427e285b482e9cc3903d658b1704.md
 
 
228 Summary Ranges c68e55b9e43744e3aba59d361b093367.md
228 Summary Ranges c68e55b9e43744e3aba59d361b093367.md
 
 
229 Majority Element II bc210f933ee0441280e6cf4579ebe274.md
229 Majority Element II bc210f933ee0441280e6cf4579ebe274.md
 
 
231 Power of Two 4bc525ee8f974975b31d1e5bb351e573.md
231 Power of Two 4bc525ee8f974975b31d1e5bb351e573.md
 
 
238 Product of Array Except Self e603c55f18eb4589878b1e60cfafd2a3.md
238 Product of Array Except Self e603c55f18eb4589878b1e60cfafd2a3.md
 
 
242 Valid Anagram 719bf6adf60e47deb01ea459a0d257fd.md
242 Valid Anagram 719bf6adf60e47deb01ea459a0d257fd.md
 
 
258. Add Digits.md
258. Add Digits.md
 
 
26 Remove Duplicates from Sorted Array 81a858eea53a4d1cbd4279ff930d57e0.md
26 Remove Duplicates from Sorted Array 81a858eea53a4d1cbd4279ff930d57e0.md
 
 
268 Missing Number 170d4aab9796423bb80e6889ee838d1d.md
268 Missing Number 170d4aab9796423bb80e6889ee838d1d.md
 
 
27 Remove Element 1c502226a1614830b330f912db240862.md
27 Remove Element 1c502226a1614830b330f912db240862.md
 
 
278. First Bad Version.md
278. First Bad Version.md
 
 
28 Find the Index of the First Occurrence in a Str 4108b621c57f40938fe0ec5dc41ea656.md
28 Find the Index of the First Occurrence in a Str 4108b621c57f40938fe0ec5dc41ea656.md
 
 
283 Move Zeroes b631a81643684514a19bb9c4338e50f4.md
283 Move Zeroes b631a81643684514a19bb9c4338e50f4.md
 
 
287 Find the Duplicate Number b9fbf44215b743c2a6b76378aa3dd113.md
287 Find the Duplicate Number b9fbf44215b743c2a6b76378aa3dd113.md
 
 
290. Word Pattern.md
290. Word Pattern.md
 
 
3 Longest Substring Without Repeating Characters 1d3a23c47eca4953982647488992a284.md
3 Longest Substring Without Repeating Characters 1d3a23c47eca4953982647488992a284.md
 
 
326. Power of Three.md
326. Power of Three.md
 
 
33 Search in Rotated Sorted Array c70bc47dcb4043d1b7360eea7081c331.md
33 Search in Rotated Sorted Array c70bc47dcb4043d1b7360eea7081c331.md
 
 
34 Find First and Last Position of Element in Sort 3a33ae215c91407eb1d1c96b0f3b2f62.md
34 Find First and Last Position of Element in Sort 3a33ae215c91407eb1d1c96b0f3b2f62.md
 
 
342. Power of Four.md
342. Power of Four.md
 
 
344. Reverse String.md
344. Reverse String.md
 
 
347 Top K Frequent Elements bd68bce2f92d4360aa5a26ec846591b7.md
347 Top K Frequent Elements bd68bce2f92d4360aa5a26ec846591b7.md
 
 
349 Intersection of Two Arrays 5c2a47dd55e945acab1d28bc7fd8b716.md
349 Intersection of Two Arrays 5c2a47dd55e945acab1d28bc7fd8b716.md
 
 
35 Search Insert Position 3e7c0816c86a4368898b4c289578aa50.md
35 Search Insert Position 3e7c0816c86a4368898b4c289578aa50.md
 
 
36 Valid Sudoku 2a5f554b7ef04784a1ee6dd9726f914c.md
36 Valid Sudoku 2a5f554b7ef04784a1ee6dd9726f914c.md
 
 
380. Insert Delete GetRandom O(1).md
380. Insert Delete GetRandom O(1).md
 
 
383 Ransom Note 03690c1c16c347efaed9abb77d518586.md
383 Ransom Note 03690c1c16c347efaed9abb77d518586.md
 
 
387. First Unique Character in a String.md
387. First Unique Character in a String.md
 
 
389 Find the Difference 19162f02036f4e7dbcd1b714f3a97112.md
389 Find the Difference 19162f02036f4e7dbcd1b714f3a97112.md
 
 
392 Is Subsequence d25839316ff74b389008933a661db4a0.md
392 Is Subsequence d25839316ff74b389008933a661db4a0.md
 
 
412. Fizz Buzz.md
412. Fizz Buzz.md
 
 
415. Add Strings.md
415. Add Strings.md
 
 
459 Repeated Substring Pattern 20b295663d4549d29f2e2d3c3ce34d66.md
459 Repeated Substring Pattern 20b295663d4549d29f2e2d3c3ce34d66.md
 
 
463 Island Perimeter 2b3f807c313f4386a495b5361ccc13ab.md
463 Island Perimeter 2b3f807c313f4386a495b5361ccc13ab.md
 
 
49 Group Anagrams 0932187d2ed0467cbb469dea9ca6b7ef.md
49 Group Anagrams 0932187d2ed0467cbb469dea9ca6b7ef.md
 
 
496 Next Greater Element I cde72f68940548f486ee5c69f41d5f66.md
496 Next Greater Element I cde72f68940548f486ee5c69f41d5f66.md
 
 
50 Pow(x, n) 273807a6d31c4477a767f53c04d65d4d.md
50 Pow(x, n) 273807a6d31c4477a767f53c04d65d4d.md
 
 
520. Detect Capital.md
520. Detect Capital.md
 
 
557 Reverse Words in a String III 3d93d5518f56432c92c8cc7319a782c3.md
557 Reverse Words in a String III 3d93d5518f56432c92c8cc7319a782c3.md
 
 
567. Permutation in String.md
567. Permutation in String.md
 
 
58 Length of Last Word f39e44e925064781a0022fcdf8818ed1.md
58 Length of Last Word f39e44e925064781a0022fcdf8818ed1.md
 
 
581 Shortest Unsorted Continuous Subarray f5e3ac2d5b644368a6fbf5a2aa268ce0.md
581 Shortest Unsorted Continuous Subarray f5e3ac2d5b644368a6fbf5a2aa268ce0.md
 
 
595 Big Countries.md
595 Big Countries.md
 
 
609. Find Duplicate File in System.md
609. Find Duplicate File in System.md
 
 
657 Robot Return to Origin 5975dcf388cf4ca1834b1816969d839c.md
657 Robot Return to Origin 5975dcf388cf4ca1834b1816969d839c.md
 
 
66 Plus One b186fd3c350c4b4cb5b0fe0a9967f95a.md
66 Plus One b186fd3c350c4b4cb5b0fe0a9967f95a.md
 
 
67 Add Binary 82e532c8c101469eb790bb517448c9f7.md
67 Add Binary 82e532c8c101469eb790bb517448c9f7.md
 
 
682 Baseball Game 60b04526e42d4fd18fd5fdb2c8b7ba30.md
682 Baseball Game 60b04526e42d4fd18fd5fdb2c8b7ba30.md
 
 
69 Sqrt(x) 04fa56dd0fab42cb81284ae760067ca1.md
69 Sqrt(x) 04fa56dd0fab42cb81284ae760067ca1.md
 
 
7 Reverse Integer 657fce4bb912481991644c066974ef24.md
7 Reverse Integer 657fce4bb912481991644c066974ef24.md
 
 
704 Binary Search 943c307422214bac99527baff0921802.md
704 Binary Search 943c307422214bac99527baff0921802.md
 
 
706 Design HashMap f8de960f11144689b5cab2758794b25e.md
706 Design HashMap f8de960f11144689b5cab2758794b25e.md
 
 
709 To Lower Case 33d64220bf814f2a995c07c891ae5d7f.md
709 To Lower Case 33d64220bf814f2a995c07c891ae5d7f.md
 
 
724 Find Pivot Index d42d1d27705c4928850de63b41f0d3e8.md
724 Find Pivot Index d42d1d27705c4928850de63b41f0d3e8.md
 
 
74 Search a 2D Matrix 99792cd519e7487e99bdcd7ebecb74c6.md
74 Search a 2D Matrix 99792cd519e7487e99bdcd7ebecb74c6.md
 
 
771 Jewels and Stones 08310d033e0049f0aa6788697c8a7dac.md
771 Jewels and Stones 08310d033e0049f0aa6788697c8a7dac.md
 
 
83 Remove Duplicates from Sorted List c2e8950e9a0949deab0e79e113864285.md
83 Remove Duplicates from Sorted List c2e8950e9a0949deab0e79e113864285.md
 
 
844. Backspace String Compare.md
844. Backspace String Compare.md
 
 
88 Merge Sorted Array 2dfa0759a4d6401db24961e8970f63e1.md
88 Merge Sorted Array 2dfa0759a4d6401db24961e8970f63e1.md
 
 
896 Monotonic Array 84bea14fec2c49f3a63454bdd1fce801.md
896 Monotonic Array 84bea14fec2c49f3a63454bdd1fce801.md
 
 
9 Palindrome Number 6f9d651b72ef4558a564a7dd80c396d0.md
9 Palindrome Number 6f9d651b72ef4558a564a7dd80c396d0.md
 
 
912 Sort an Array ec23da2b18b84519a6a3690b6669966b.md
912 Sort an Array ec23da2b18b84519a6a3690b6669966b.md
 
 

Repository files navigation

problem solving

Num Question Difficulty Solution
1 1. Two Sum $\color{Green}Easy$ Link
2 3. Longest Substring Without Repeating Characters $\color{Orange}Medium$ Link
3 7. Reverse Integer $\color{Orange}Medium$ Link
4 9. Palindrome Number $\color{Green}Easy$ Link
5 12. Integer to Roman $\color{Orange}Medium$ Link
6 13. Roman to Integer $\color{Green}Easy$ Link
7 14. Longest Common Prefix $\color{Green}Easy$ Link
8 20. Valid Parentheses $\color{Green}Easy$ Link
9 26. Remove Duplicates from Sorted Array $\color{Green}Easy$ Link
10 27. Remove Element $\color{Green}Easy$ Link
11 28. Find the Index of the First Occurrence in a String $\color{Green}Easy$ Link
12 33. Search in Rotated Sorted Array $\color{Orange}Medium$ Link
13 34. Find First and Last Position of Element in Sorted Array $\color{Orange}Medium$ Link
14 35. Search Insert Position $\color{Green}Easy$ Link
15 36. Valid Sudoku $\color{Orange}Medium$ Link
16 49. Group Anagrams $\color{Orange}Medium$ Link
17 50. Pow(x, n) $\color{Orange}Medium$ Link
18 58. Length of Last Word $\color{Green}Easy$ Link
19 66. Plus One $\color{Green}Easy$ Link
20 67. Add Binary $\color{Green}Easy$ Link
21 69. Sqrt(x) $\color{Green}Easy$ Link
22 74. Search a 2D Matrix $\color{Orange}Medium$ Link
23 83. Remove Duplicates from Sorted List $\color{Green}Easy$ Link
24 88. Merge Sorted Array $\color{Green}Easy$ Link
25 118. Pascal's Triangle $\color{Green}Easy$ Link
26 119. Pascal's Triangle II $\color{Green}Easy$ Link
27 121. Best Time to Buy and Sell Stock $\color{Green}Easy$ Link
28 125. Valid Palindrome $\color{Green}Easy$ Link
29 128. Longest Consecutive Sequence $\color{Orange}Medium$ Link
30 136. Single Number $\color{Green}Easy$ Link
31 150. Evaluate Reverse Polish Notation $\color{Orange}Medium$ Link
32 167. Two Sum II - Input Array Is Sorted $\color{Orange}Medium$ Link
33 169. Majority Element $\color{Green}Easy$ Link
34 202. Happy Number $\color{Green}Easy$ Link
35 205. Isomorphic Strings $\color{Green}Easy$ Link
36 206. Reverse Linked List $\color{Green}Easy$ Link
37 217. Contains Duplicate $\color{Green}Easy$ Link
38 225. Implement Stack using Queues $\color{Green}Easy$ Link
39 228. Summary Ranges $\color{Green}Easy$ Link
40 229. Majority Element II $\color{Orange}Medium$ Link
41 231. Power of Two $\color{Green}Easy$ Link
42 238. Product of Array Except Self $\color{Orange}Medium$ Link
43 242. Valid Anagram $\color{Green}Easy$ Link
44 258. Add Digits $\color{Green}Easy$ Link
45 268. Missing Number $\color{Green}Easy$ Link
46 278. First Bad Version $\color{Green}Easy$ Link
47 283. Move Zeroes $\color{Green}Easy$ Link
48 287. Find the Duplicate Number $\color{Orange}Medium$ Link
49 290. Word Pattern $\color{Green}Easy$ Link
50 326. Power of Three $\color{Green}Easy$ Link
51 342. Power of Four $\color{Green}Easy$ Link
52 344. Reverse String $\color{Green}Easy$ Link
53 347. Top K Frequent Elements $\color{Orange}Medium$ Link
54 349. Intersection of Two Arrays $\color{Green}Easy$ Link
55 380. Insert Delete GetRandom O(1).md $\color{Orange}Medium$ Link
56 383. Ransom Note $\color{Green}Easy$ Link
57 387. First Unique Character in a String $\color{Green}Easy$ Link
58 389. Find the Difference $\color{Green}Easy$ Link
59 392. Is Subsequence $\color{Green}Easy$ Link
60 412. Fizz Buzz $\color{Green}Easy$ Link
61 415. Add Strings $\color{Green}Easy$ Link
62 459. Repeated Substring Pattern $\color{Green}Easy$ Link
63 463. Island Perimeter $\color{Green}Easy$ Link
64 496. Next Greater Element I $\color{Green}Easy$ Link
65 520. Detect Capital $\color{Green}Easy$ Link
66 557. Reverse Words in a String III $\color{Green}Easy$ Link
67 567. Permutation in String $\color{Orange}Medium$ Link
68 581. Shortest Unsorted Continuous Subarray $\color{Orange}Medium$ Link
69 595. Big Countries $\color{Orange}Medium$ Link
70 609. Find Duplicate File in System $\color{Orange}Medium$ Link
71 657. Robot Return to Origin $\color{Green}Easy$ Link
72 682. Baseball Game $\color{Green}Easy$ Link
73 704. Binary Search $\color{Green}Easy$ Link
74 706. Design HashMap $\color{Green}Easy$ Link
75 709. To Lower Case $\color{Green}Easy$ Link
76 724. Find Pivot Index $\color{Green}Easy$ Link
77 771. Jewels and Stones $\color{Green}Easy$ Link
78 844. Backspace String Compare $\color{Green}Easy$ Link
79 896. Monotonic Array $\color{Green}Easy$ Link
80 912. Sort an Array $\color{Orange}Medium$ Link
81 917. Reverse Only Letters $\color{Green}Easy$ Link
82 981. Time Based Key-Value Store $\color{Orange}Medium$ Link
83 1021. Remove Outermost Parentheses $\color{Green}Easy$ Link
84 1048. Longest String Chain $\color{Orange}Medium$ Link
85 1089. Duplicate Zeros $\color{Green}Easy$ Link
86 1108. Defanging an IP Address $\color{Green}Easy$ Link
87 1207. Unique Number of Occurrences $\color{Green}Easy$ Link
88 1275. Find Winner on a Tic Tac Toe Game $\color{Green}Easy$ Link
89 1299. Replace Elements with Greatest Element on Right Side $\color{Green}Easy$ Link
90 1337. The K Weakest Rows in a Matrix $\color{Green}Easy$ Link
91 1365. How Many Numbers Are Smaller Than the Current Number $\color{Green}Easy$ Link
92 1347. Minimum Number of Steps to Make Two Strings Anagram $\color{Orange}Medium$ Link
93 1464. Maximum Product of Two Elements in an Array $\color{Green}Easy$ Link
94 1480. Running Sum of 1d Array $\color{Green}Easy$ Link
95 1491. Average Salary Excluding the Minimum and Maximum Salary $\color{Green}Easy$ Link
96 1496. Path Crossing $\color{Green}Easy$ Link
97 1502. Can Make Arithmetic Progression From Sequence $\color{Green}Easy$ Link
98 1512. Number of Good Pairs $\color{Green}Easy$ Link
99 1523. Count Odd Numbers in an Interval Range $\color{Green}Easy$ Link
100 1535. Find the Winner of an Array Game $\color{Orange}Medium$ Link
101 1572. Matrix Diagonal Sum $\color{Green}Easy$ Link
102 1603. Design Parking System $\color{Green}Easy$ Link
103 1657. Determine if Two Strings Are Close $\color{Orange}Medium$ Link
104 1704. Determine if String Halves Are Alike $\color{Green}Easy$ Link
105 1757. Recyclable and Low Fat Products $\color{Green}Easy$ Link
106 1768. Merge Strings Alternately $\color{Green}Easy$ Link
107 1773. Count Items Matching a Rule $\color{Green}Easy$ Link
108 1822. Sign of the Product of an Array $\color{Green}Easy$ Link
109 1845. Seat Reservation Manager $\color{Orange}Medium$ Link
110 1920. Build Array from Permutation $\color{Green}Easy$ Link
111 1929. Concatenation of Array $\color{Green}Easy$ Link
112 2129. Capitalize the Title $\color{Green}Easy$ Link
113 2215. Find the Difference of Two Arrays $\color{Green}Easy$ Link
114 2225. Find Players With Zero or One Losses $\color{Orange}Medium$ Link
115 2460. Apply Operations to an Array $\color{Green}Easy$ Link
116 2610. Convert an Array Into a 2D Array With Conditions $\color{Orange}Medium$ Link
117 2785. Sort Vowels in a String $\color{Orange}Medium$ Link
118 2904. Shortest and Lexicographically Smallest Beautiful String $\color{Orange}Medium$ Link

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A collection of Java solutions for various LeetCode problems that i have solved

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