文件列表:

.idea/ (0, 2023-08-19)
.idea/letscode.iml (635, 2023-08-19)
.idea/modules.xml (268, 2023-08-19)
codes/ (0, 2023-08-19)
codes/arrays_and_hashing/ (0, 2023-08-19)
codes/arrays_and_hashing/contains-duplicate.rb (169, 2023-08-19)
codes/arrays_and_hashing/encode_decode_strings.rb (539, 2023-08-19)
codes/arrays_and_hashing/group-anagrams.rb (368, 2023-08-19)
codes/arrays_and_hashing/longest-consecutive-sequence.rb (386, 2023-08-19)
codes/arrays_and_hashing/product-of-array-except-self.rb (524, 2023-08-19)
codes/arrays_and_hashing/top_k_frequent_elements.rb (180, 2023-08-19)
codes/arrays_and_hashing/two-sum.rb (327, 2023-08-19)
codes/arrays_and_hashing/valid-sudoku.rb (1036, 2023-08-19)
codes/arrays_and_hashing/valid_anagram.rb (262, 2023-08-19)
codes/stack/ (0, 2023-08-19)
codes/stack/daily-temperatures.rb (303, 2023-08-19)
codes/stack/evaluate-reverse-polish-notation.rb (683, 2023-08-19)
codes/stack/generate-parentheses.rb (325, 2023-08-19)
codes/stack/min-stack.rb (765, 2023-08-19)
codes/stack/valid-parentheses.rb (342, 2023-08-19)
codes/two_pointers/ (0, 2023-08-19)
codes/two_pointers/3sum.rb (945, 2023-08-19)
codes/two_pointers/container-with-most-water.rb (454, 2023-08-19)
codes/two_pointers/trapping-rain-water.rb (500, 2023-08-19)
codes/two_pointers/two-sum-ii-input-array-is-sorted.rb (482, 2023-08-19)
codes/two_pointers/valid-palindrome.rb (214, 2023-08-19)

# LetsCode Competitive programming solutions for leetcode problems listed at [NeetCode](http://neetcode.io) [Analysis tips here](https://docs.google.com/spreadsheets/d/1gPybKvlFiaeBnG4FVrBNf9Cr9YvTXajOWDdjLqrNk9s/edit?usp=sharing) ## Array and Hashing | Problem | Solution | | ------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------------- | | [Contains Duplicate](https://leetcode.com/problems/contains-duplicate/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/arrays_and_hashing/contains-duplicate.rb) | | [Valid Anagram](https://leetcode.com/problems/valid-anagram/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/arrays_and_hashing/valid-anagram.rb) | | [Two Sum](https://leetcode.com/problems/two-sum/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/arrays_and_hashing/two-sum.rb) | | [Group Anagrams](https://leetcode.com/problems/group-anagrams/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/arrays_and_hashing/group-anagrams.rb) | | [Top K Frequent Elements](https://leetcode.com/problems/top-k-frequent-elements/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/arrays_and_hashing/top-k-frequent-elements.rb) | | [Product of Array Except Self](https://leetcode.com/problems/product-of-array-except-self/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/arrays_and_hashing/product-of-array-except-self.rb) | | [Valid Sudoku](https://leetcode.com/problems/valid-sudoku/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/arrays_and_hashing/valid-sudoku.rb) | | [Encode and Decode Strings](https://www.lintcode.com/problem/659/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/arrays_and_hashing/encode_decode_strings.rb) | | [Longest Consecutive Sequence](https://leetcode.com/problems/longest-consecutive-sequence/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/arrays_and_hashing/longest-consecutive-sequence.rb) | ## Two pointers | Problem | Solution | | ----------------------------------------------------------------------------------------------------- | --------------------------------------------------------------------------------------------------------------- | | [Valid Palindrome](https://leetcode.com/problems/valid-palindrome/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/two_pointers/valid-palindrome.rb) | | [Two Sum II - Input Array Is Sorted](https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/two_pointers/two-sum-ii-input-array-is-sorted.rb) | | [3 Sum](https://leetcode.com/problems/3sum/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/two_pointers/3sum.rb) | | [Container With Most Water](https://leetcode.com/problems/container-with-most-water/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/two_pointers/container-with-most-water.rb) | | [Trapping Rain Water](https://leetcode.com/problems/trapping-rain-water/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/two_pointers/trapping-rain-water.rb) | ## Stack | Problem | Solution | | --------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------- | | [Valid Parentheses](https://leetcode.com/problems/valid-parentheses/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/stack/valid-parentheses.rb) | | [Min Stack](https://leetcode.com/problems/min-stack/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/stack/min-stack.rb) | | [Evaluate Reverse Polish Notation](https://leetcode.com/problems/evaluate-reverse-polish-notation/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/stack/evaluate-reverse-polish-notation.rb) | | [Generate Parentheses](https://leetcode.com/problems/generate-parentheses/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/stack/generate-parentheses.rb) | | [Daily Temperatures](https://leetcode.com/problems/daily-temperatures/) | [Code](https://github.com/sameer1612/letscode/blob/main/codes/stack/daily-temperatures.rb) |

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