1 Two Sum
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Solution to Leetcode 1
Leetcode Solutions
These are my solutions to some Leetcode problems. I like puzzles and the challenge that comes from doing these so I have been attempting some daily questions and solving a few others to continue working on my problem solving skills as a software engineer. I also love teaching and helping others so I’ve been publishing my solutions in the hopes of helping someone else out. If you find something incorrect, please make a pull request!
2 Add Two Numbers
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Solution to Leetcode 2
3 Longest Substring Without Repeating Characters
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Solution to Leetcode 3
11 Container with Most Water
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Solution to Leetcode 11
13 Roman to Integer
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Solution to Leetcode 13
19 Remove Nth Node From End of List
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Solution to Leetcode 19
21 Merge Two Sorted Lists
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Solution to Leetcode 21
26 Remove Duplicates from Sorted Array
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Solution to Leetcode 26
27 Remove Element
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Solution to Leetcode 27
35 Search Insert Position
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Solution to Leetcode 35
36 Valid Sudoku
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Solution to Leetcode 36
49 Group Anagrams
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Solution to Leetcode 49
55 Jump Game
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Solution to Leetcode 55
58 Length of Last Word
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Solution to Leetcode 58
70 Climbing Stairs
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Solution to Leetcode 70
80 Remove Duplicates from Sorted Array II
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Solution to Leetcode 80
83 Remove Duplicates from Sorted List
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Solution to Leetcode 83
100 Same Tree
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Solution to Leetcode 100
104 Maximum Depth of Binary Tree
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Solution to Leetcode 104
108 Convert Sorted Array to Binary Search Tree
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Solution to Leetcode 108
121 Best Time to Buy and Sell Stock
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Solution to Leetcode 121
122 Best Time to Buy and Sell Stock II
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Solution to Leetcode 122
125 Valid Palindrome
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Solution to Leetcode 125
128 Longest Consecutive Sequence
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Solution to Leetcode 128
138 Copy List with Random Pointer
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Solution to Leetcode 138
141 Linked List Cycle
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Solution to Leetcode 141
150 Evaluate Reverse Polish Notation
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Solution to Leetcode 150
167 Two Sum II - Input Array is Sorted
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Solution to Leetcode 167
169 Majority Element
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Solution to Leetcode 169
189 Rotate Array
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Solution to Leetcode 189
198 House Robber
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Solution to Leetcode 198
206 Reverse Linked List
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Solution to Leetcode 206
217 Contains Duplicate
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Solution to Leetcode 217
219 Contains Duplicate II
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Solution to Leetcode 219
226 Invert Binary Tree
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Solution to Leetcode 226
228 Summary Ranges
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Solution to Leetcode 228
238 Product of Array Except Self
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Solution to Leetcode 238
268 Missing Number
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Solution to Leetcode 268
274 H-Index
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Solution to Leetcode 274
344 Reverse String
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Solution to Leetcode 344
347 Top K Frequent Elements
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Solution to Leetcode 347
349 Intersection of Two Arrays
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Solution to Leetcode 349
387 First Unique Character in a String
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Solution to Leetcode 387
455 Assign Cookies
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Solution to Leetcode 455
509 Fibonacci Number
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Solution to Leetcode 509
513 Find Bottom Left Tree Value
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Solution to Leetcode 513
561 Array Partition
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Solution to Leetcode 561
643 Maximum Average Subarray
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Solution to Leetcode 643
645 Set Mismatch
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Solution to Leetcode 645
704 Binary Search
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Solution to Leetcode 704
713 Subarray Product Less Than K
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Solution to Leetcode 713
739 Daily Temperatures
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Solution to Leetcode 739
771 Jewels and Stones
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Solution to Leetcode 771
791 Custom Sort String
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Solution to Leetcode 791
867 Transpose Matrix
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Solution to Leetcode 867
872 Leaf-Similar Trees
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Solution to Leetcode 872
876 Middle of the Linked List
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Solution to Leetcode 876
896 Monotonic Array
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Solution to Leetcode 896
938 Range Sum of BST
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Solution to Leetcode 938
977 Squares of a Sorted Array
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Solution to Leetcode 977
997 Find the Town Judge
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Solution to Leetcode 997
1026 Maximum Difference Between Node and Ancestor
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Solution to Leetcode 1026
1137 N-th Tribonacci Number
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Solution to Leetcode 1160
1160 Find Words That Can Be Formed by Characters
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Solution to Leetcode 1160
1207 Unique Number of Occurrences
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Solution to Leetcode 1207
1266 Minimum Time Visiting All Points
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Solution to Leetcode 1266
1291 Sequential Digits
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Solution to Leetcode 1291
1413 Minimum Value to Get Positive Step by Step Sum
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Solution to Leetcode 1413
1426 Counting Elements
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Solution to Leetcode 1426
1436 Destination City
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Solution to Leetcode 1436
1441 Build an Array with Stack Operations
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Solution to Leetcode 1441
1442 Maximum Score After Splitting a String
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Solution to Leetcode 1442
1464 Maximum Product of Two Elements in an Array
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Solution to Leetcode 1464
1480 Running Sum of 1d Array
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Solution to Leetcode 1480
1496 Path Crossing
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Solution to Leetcode 1496
1512 Number of Good Pairs
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Solution to Leetcode 1512
1561 Maximum Number of Coins You Can Get
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Solution to Leetcode 1561
1609 Even Odd Tree
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Solution to Leetcode 1609
1624 Largest Substring Between Two Equal Characters
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Solution to Leetcode 1624
1637 Widest Vertical Area Between Two Points Containing No Points
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Solution to Leetcode 1637
1669 Merge In Between Linked Lists
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Solution to Leetcode 1669
1688 Count of Matches in Tournament
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Solution to Leetcode 1688
1700 Number of Students Unable to Eat Lunch
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Solution to Leetcode 1700
1704 Determine if String Halves Are Alike
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Solution to Leetcode 1704
1716 Calculate Money in Leetcode Bank
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Solution to Leetcode 1716
1750 Minimum Length of String After Deleting Similar Ends
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Solution to Leetcode 1750
1758 Minimum Changes to Make Alternating Binary String
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Solution to Leetcode 1758
1759 Count Number of Homogenous Substrings
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Solution to Leetcode 1759
1887 Reduction Operations to Make the Array Elements Equal
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Solution to Leetcode 1887
1897 Redistribute Characters to Make All Strings Equal
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Solution to Leetcode 1897
1903 Largest Odd Number in String
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Solution to Leetcode 1903
1913 Maximum Product Difference Between Two Pairs
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Solution to Leetcode 1913
1929 Concatenation of Array
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Solution to Leetcode 1929
1980 Find Unique Binary String
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Solution to Leetcode 1980
2016 Maximum Difference Between Increasing Elements
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Solution to Leetcode 2016
2073 Time Needed To Buy Tickets
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Solution to Leetcode 2073
2108 Find First Palindromic String in the Array
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Solution to Leetcode 2108
2125 Number of Laser Beams in a Bank
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Solution to Leetcode 2125
2149 Rearrange Array Elements by Sign
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Solution to Leetcode 2149
2225 Find Players With Zero or One Losses
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Solution to Leetcode 2225
2264 Largest 3-Same-Digit Number in String
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Solution to Leetcode 2264
2265 Count Nodes Equal to Average of Subtree
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Solution to Leetcode 2265
2391 Minimum Amount of Time to Collect Garbage
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Solution to Leetcode 2391
2540 Minimum Common Value
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Solution to Leetcode 2540
2610 Covert an Array Into a 2D Array With Conditions
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Solution to Leetcode 2610
2706 Buy Two Chocolates
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Solution to Leetcode 2706
2785 Sort Vowels in a String
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Solution to Leetcode 2785
2816 Double a Number Represented as a Linked List
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Solution to Leetcode 2816
2864 Maximum Odd Binary Number
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Solution to Leetcode 2864
2870 Minimum Number of Operations to Make Array Empty
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Solution to Leetcode 2870
2966 Divide Array into Arrays with Max Difference
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Solution to Leetcode 2966
2971 Find Polygon With the Largest Perimeter
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Solution to Leetcode 2971
3005 Count Elements With Maximum Frequency
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Solution to Leetcode 3005