My latest accomplishment these days😎😎

Another 50 days Badge for 2024.
To be honest I haven't been solving problems for the last 3 months, and today this image is appearing after long time break😊😊 It made my day.

Title: 345. Reverse Vowels of a String
Level: Easy

Title: 2390. Removing Stars From a String
Level: Medium

Title: 394. Decode String
Level: Medium
#stack

Title: 1456. Maximum Number of Vowels in a Substring of Given Length
Level: Medium
#sliding_window

Did you know that you can find and solve leetcode premium problems in lintcode.com with free access?
For example:
Premium: https://leetcode.com/problems/encode-and-decode-strings/description/
https://www.lintcode.com/problem/659/

125. Valid Palindrome: https://leetcode.com/problems/valid-palindrome/description/
Idea from Neetcode: https://youtu.be/jJXJ16kPFWg

One more small achievement

Title: 853. Car Fleet
Level: Medium
#stack

Very interesting problem. Try to solve it.
Watched beautiful solution from Neetcode

Title: 875. Koko Eating Bananas
Level: Medium
https://leetcode.com/problems/koko-eating-bananas/

#binary_search

Title: 74. Search a 2D Matrix
Level: Medium
https://leetcode.com/problems/search-a-2d-matrix/description/

#binary_search

Title: 110. Balanced Binary Tree
Level: Easy
https://leetcode.com/problems/balanced-binary-tree/description/

#tree

Title: 572. Subtree of Another Tree
Level: Easy
https://leetcode.com/problems/subtree-of-another-tree/description/

Title: 102. Binary Tree Level Order Traversal
URL: leetcode
Level: Medium
#DFS

Title: 297. Serialize and Deserialize Binary Tree
URL: https://leetcode.com/problems/serialize-and-deserialize-binary-tree/
Level: Hard

Initially, it looked very difficult, as soon as I tried smth on my own and then watched solution from neetcode: https://neetcode.io/solutions/serialize-and-deserialize-binary-tree
Solution was very straightforward.

Ko'z qo'rqoq, qo'l botir.
#DFS #binary_tree

Backtracking problems are almost always implemented using a depth-first search (DFS) strategy — but not all DFS is backtracking, and not all DFS problems require pruning or reversal (which backtracking does).

Advent of Code 2025 yaqinlashmoqda 🎉🚀

1-dekabrdan 12-dekabrgacha har kuni 2ta programming puzzle yechamiz. O'tgan yilgi AoC ham juda qiziq bo'lgandi va top o'rin olganlar bilan maroqli suxbat qilgan edik.

Bu yilgi sovrinlar:
1-o'rin: Pixel Buds Pro 2 — Bobosher Musurmonov tomonidan.
2-o'rin: Logitech MX Master 3S — Farrukh Atabekov tomonidan.
3-o'rin: 3ta kitob (Code, Flow, va Deep Work) — Jakhongir Rakhmonov va men tomonidan.

Va musobaqadan so'ng top 10 kishi bilan har yilgidek meetup tashkil qilamiz.

Join link: https://adventofcode.com/2025/leaderboard/private/view/2432563 (birinchi login qiling)
Kirish kodi: 2432563-8d25532c
Qoidalar: https://adventofcode.com/2025/about

Leaderboard'ga max 200 kishi qo‘shila oladi. Agar siz qo‘shilgani ulgurmagan bo‘lsangiz, xavotirlanmang. Masalalarni yechavering, men har 2-3 kunda nofaollarni leaderboard'dan olib tashlayman, qo‘shilgani yana imkoniyat bo‘ladi.

Cheating oldini olish uchun, musobaqa ohirida top 10talikdan proof of work so‘raladi. Ya’ni, puzzle'larni mustaqil ravishda ishlaganingizni isbotlab berishingiz kerak bo‘ladi.

Let's go 🚀🚀🚀