https://github.com/adeldaniel/leetcode-problem-solving-in-dart

This codebase is for competitive programming (Problem Solving) exercises with Dart LeetCode and other platforms.
https://github.com/adeldaniel/leetcode-problem-solving-in-dart

challanges dart dartlang dartlanguage data-structure data-structures data-structures-algorithms data-structures-and-algorithms dsa dsa-algorithm dsa-practice leetcode leetcode-dart leetcode-solutions problem-solving problemsolving programming-challenges

Last synced: 5 months ago
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This codebase is for competitive programming (Problem Solving) exercises with Dart LeetCode and other platforms.

• Host: GitHub
• URL: https://github.com/adeldaniel/leetcode-problem-solving-in-dart
• Owner: AdelDaniel
• Created: 2018-07-29T22:30:30.000Z (over 7 years ago)
• Default Branch: main
• Last Pushed: 2025-06-15T12:56:58.000Z (6 months ago)
• Last Synced: 2025-06-29T14:39:36.743Z (6 months ago)
• Topics: challanges, dart, dartlang, dartlanguage, data-structure, data-structures, data-structures-algorithms, data-structures-and-algorithms, dsa, dsa-algorithm, dsa-practice, leetcode, leetcode-dart, leetcode-solutions, problem-solving, problemsolving, programming-challenges
• Language: Dart
• Homepage:
• Size: 108 KB
• Stars: 0
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# All Problems

## Codewars:

### Easy Problems

- https://www.codewars.com/kata/5ce9c1000bab0b001134f5af

---

## Leetcode

### Easy Problems

- https://leetcode.com/problems/length-of-last-word/

- https://leetcode.com/problems/fizz-buzz/description/

- https://leetcode.com/problems/binary-search/

- XOR: https://leetcode.com/problems/single-number/description/

- https://leetcode.com/problems/count-subarrays-of-length-three-with-a-condition/description/?envType=daily-question&envId=2025-04-27

- https://leetcode.com/problems/palindrome-number/description/

- Log(n^2) https://leetcode.com/problems/two-sum/description/

- HashMap: https://leetcode.com/problems/two-sum/description/

- Two Pointers: https://leetcode.com/problems/move-zeroes/description/

- One Pointer: https://leetcode.com/problems/best-time-to-buy-and-sell-stock/description/

- https://leetcode.com/problems/ransom-note/

- https://leetcode.com/problems/contains-duplicate/

- https://leetcode.com/problems/contains-duplicate-ii/description/

- https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/description/

- https://leetcode.com/problems/three-consecutive-odds/description/?envType=daily-question&envId=2025-05-11

- String Problem: https://leetcode.com/problems/is-subsequence/description/

- https://leetcode.com/problems/remove-duplicates-from-sorted-array/description/

- https://leetcode.com/problems/valid-palindrome/

- https://leetcode.com/problems/merge-sorted-array/

- https://leetcode.com/problems/valid-parentheses/description/

### Medium Problems

- https://leetcode.com/problems/search-in-rotated-sorted-array/description/

- https://leetcode.com/problems/find-minimum-in-rotated-sorted-array/description/

- Factorial Trailing Zeroes: https://leetcode.com/problems/factorial-trailing-zeroes/submissions/

- https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/

- https://leetcode.com/problems/rotate-array/description/

- https://leetcode.com/problems/jump-game/description/

- https://leetcode.com/problems/product-of-array-except-self/

- Hash Table: https://leetcode.com/problems/sequential-digits/description/

- Hash Table: https://leetcode.com/problems/find-all-duplicates-in-an-array/

- https://leetcode.com/problems/minimum-equal-sum-of-two-arrays-after-replacing-zeros/description/?envType=daily-question&envId=2025-05-10

- Bad Question : I don't recommend to solve: https://leetcode.com/problems/next-permutation/description/

- https://leetcode.com/problems/subarray-product-less-than-k/description/

- https://leetcode.com/problems/k-diff-pairs-in-an-array/description/

- Two Pointers: with new idea: https://leetcode.com/problems/two-sum-ii-input-array-is-sorted/description/

- https://leetcode.com/problems/sort-colors/description/

- Medium but Very Hard: https://leetcode.com/problems/3sum/

- https://leetcode.com/problems/asteroid-collision/

- https://leetcode.com/problems/decode-string/ 

### Hard Problems

- https://leetcode.com/problems/first-missing-positive/description/

- Very Hard with idea: https://leetcode.com/problems/longest-valid-parentheses/description/

### Topics

- XOR

- Binary Search

- Rotated Sorted Array

- Palindrome Number

- Factorial

- **Hash Map** (DS)

- 2 Pointers (Two Pointers)

  - left and right pointers

  - Sliding window

- Prefix sum &&& Suffix sum

- Prefix product &&& Suffix product

- Hash Table (DS)

- Mark Indices --> By negative value

- Sliding Window

- Stack (DS)

### Algorithms

- Greedy Algorithm

### Notes:

- Map In Dart (Hash Map ---- Linked Hash Map ---- Splay Tree Map)

- Hash Map (Not Ordered) -- Hash Table (Ordered)

- Hash Table

  A Hash table is defined as a data structure used to insert, look up, and remove key-value pairs quickly.

  It operates on the hashing concept,

  where each key is translated by a hash function into a distinct index in an array.

  The index functions as a storage location for the matching value.

  In simple words, it maps the keys with the value.

- Find Sum of 2 Numbers in sorted List

  1. Brute Force (Bad)

  2. Two Pointers