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Coding-Challanges

Solutions for coding practices and challenges.

LeetCode

(Note: 🔒 == Premium)

# Title Solution Difficulty Note
2 Add Two Numbers Python3 Medium
3 Longest Substring Without Repeating Characters Python3 Medium
5 Longest Palindromic Substring Python3 Medium
11 Container With Most Water Python3 Medium
12 Integer to Roman Python3 Medium
15 3Sum Python3 Medium
17 Letter Combinations of a Phone Number Python3 Medium
18 4Sum Python3 Medium
19 Remove Nth Node From End of List Python3 Medium
33 Search in Rotated Sorted Array Python3 Medium
34 Find First and Last Position of Element in Sorted Array Python3 Medium recursive
34 Find First and Last Position of Element in Sorted Array Python3 Medium loop
39 Combination Sum Python3 Medium
40 Combination Sum2 Python3 Medium
42 Trapping Rain Water Python3 Hard
46 Permutations Python3 Medium
121 Best Time to Buy and Sell Stock Python3 Easy
159 Longest Substring with At Most Two Distinct Characters 🔒 Python3 Medium
200 Number of Islands Python3 Medium
247 Strobogrammatic Number II 🔒 Python3 Easy
252 Meeting Rooms 🔒 Python3 Easy
269 Alien Dictionary 🔒 Python3 Hard
272 Find the Celebrity 🔒 Python3 Medium
283 Move Zeroes Python3 Easy
307 Range Sum Query - Mutable Python3 Medium
339 Nested List Weight Sum 🔒 Python3 Easy
359 Logger Rate Limiter 🔒 Python3 Easy
387 First Unique Character in a String 🔒 Python3 Easy
410 Split Array Largest Sum 🔒 Python3 Hard
425 Word Squares 🔒 Python3 Hard
436 Read N Characters Given Read4 II - Call multiple times 🔒 Python3 Hard
489 Robot Room Cleaner 🔒 Python3 Hard
604 Design Compressed String Iterator 🔒 Python3 Easy
624 Maximum Distance in Arrays 🔒 Python3 Easy
642 Design Search Autocomplete System 🔒 Python3 Hard
833 Find And Replace in String Python3 Medium
702 Search in a Sorted Array of Unknown Size 🔒 Python3 Medium
716 Max Stack 🔒 Python3 Easy
904 Fruit Into Baskets Python3 Medium
929 Unique Email Addresses Python3 Easy
949 Largest Time for Given Digits Python3 Easy
980 Unique Paths III Python3 Hard
1427 Perform String Shifts 🔒 Python3 Easy
1480 Add Running Sum of 1d Array Python3 Easy

Codility

HackerRank

Programmers

CtCI (Cracking the Coding Interview)

  1. 0-1. IsDouble in Python
  2. 1-1. IsUnique in Python

Author

Byung Soo Ko / kobiso62@gmail.com

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