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Hoang Nguyen Khanh Ngan


Last seen: Today 2025 年からアクティブ

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5-year Annedversaries
This is the Bonus Round problem for the 2025 Cody Contest. Attend the watch party on Friday, March 27 to see how 6 champions fro...

約23時間 前

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Project Aether: Non-Linear Temporal Flow Optimization
Ⅰ. Description In the year 2450, you are the Chief Architect of the Neo-Elysium defense grid. You must manage energy distributi...

3日 前

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The Omega Protocol: Hyper-dimensional Navigation and the Singularity Constraint
Description [EMERGENCY TRANSMISSION - GALACTIC COMMAND] Subject: Mission Omega-7 - Navigation through the K-94 Tesseract Anoma...

4日 前

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Robust Huffman Decoding: The Single-Bit Error Challenge
In the world of data compression, Huffman coding is a classic algorithm. However, it is notoriously fragile: a single bit error ...

4日 前

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The Optimal 2D Guillotine Cutting Stock Problem
You are working in a factory that produces rectangular glass sheets. You have a large stock plate of size W x H. Customers have ...

4日 前

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Interstellar Navigation: Minimum Time with Moving Hazards
You are the pilot of a spaceship at the origin P_start = (0,0,0) at time t = 0. Your mission is to reach a space station located...

4日 前

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The Quantum Knight's Tour on a Toroidal Hexagonal Board
In this challenge, you must navigate a knight on a Toroidal Hexagonal Grid of size The grid: We use the Axial Coordinate Syst...

4日 前

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The Ultimate Water Challenge ( Expert )
Description: In the previous problems, you were given a target T and asked to find the minimum number of steps to reach it. ...

30日 前

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Weighted Costs ( Hard )
Different actions have different monetary costs: Fill = $10 , Empty = $5 , Pour = $1 #Note: It's just an example Find the mini...

30日 前

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Minimal Waste Pouring ( Hard )
Everytime you perform Empty action, water is wasted. Instead of minimizing steps, find the path that minimizes the total volume ...

30日 前

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Record the Actions
Find the minimum steps to get T units from jugs A and B. Return the sequence of actions as cell array of strings. Available act...

30日 前

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The Broken Jug: Constrain ( Hard )
One of your jugs is "broken": it can not be Emptied to the drain. It can only be Filled or Poured to another jug. Input: C, T, ...

30日 前

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The Classic 8-5-3 Sharing
You have 3 jugs with capacities [8,5,3]. The 8L jug, the others are empty: [8,0,0]. There is no tap and no drain. You can only p...

30日 前

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Total Volume Goal
Usually, the target T must be in one jug. In this version, the target T is the sum of water in all N jugs. Example: C = [3,5], ...

30日 前

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Two Jugs: Minimum Steps
Following the first problem, now you need to find the shortest path. Given two jugs with capacities A and B, find the minimum nu...

30日 前

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Is it Possible?
In the first part of series, we simplify the problem. Given two jugs with capacities A and B, and a target amount T, determine i...

30日 前

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The Generalized N-Jug Water Pouring Problem
Description: You are given N water jugs with maximum capacities specified in a vector C = [ c1, c2, c3,.., c_n]. Initially, all...

約1ヶ月 前

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PACMAT 05 - Optimized Ghosts, PACMAT increasing speed, 12 Lives
The Classic PACMAN game brought to Cody. PACMAT requires clearing the Yellow Dots while avoiding the wandering ghosts in 12 l...

約2ヶ月 前

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Jump Game
Bạn được cho một mảng số nguyên nums. Ban đầu bạn được đặt ở vị trí chỉ mục đầu tiên của mảng, và mỗi phần tử trong mảng biểu th...

約2ヶ月 前

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Leo Bậc Thang
Bạn đang leo cầu thang. Cần n bước để lên đến đỉnh. Mỗi lần bạn có thể leo 1 hoặc 2 bước. Hỏi có bao nhiêu cách khác nhau để le...

約2ヶ月 前

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[Master Regular Expression] String To Integer
Implement the myAtoi(string s) function, which converts a string to a 32-bit signed integer. The algorithm for myAtoi(string s)...

約2ヶ月 前

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[Master Regular Expression] Unique Email Addresses
Every valid email consists of a local name and a domain name, separated by the '@' sign. Besides lowercase letters, the email ma...

約2ヶ月 前

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[Master Regular Expression] Keyboard Row
Given an array of strings words, return the words that can be typed using letters of the alphabet on only one row of American ke...

約2ヶ月 前

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[Master Regular Expression] Goat Latin
You are given a string sentence that consist of words separated by spaces. Each word consists of lowercase and uppercase letters...

約2ヶ月 前

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[Master Regular Expression] Reformat Phone Number
You are given a phone number as a string number. number consists of digits, spaces ' ', and/or dashes '-'. You would like to re...

約2ヶ月 前

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Calendar Matrix
Return a calendar matrix for the given values of month and year. Assume that Sunday is the first day of the week. The resulting ...

4ヶ月 前

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The Matrix Construction
Given two input ,first one is CN (Column Number), Second one is Dim Can you produce such a matrix for example CN=6; Dim=2 ...

4ヶ月 前

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Diagonal of a Spiral Matrix
Write a function that will return same output as diag(spiral(n)). The only exception is that spiral and diag functions are not a...

4ヶ月 前

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Fibonacci Decomposition
Every positive integer has a unique decomposition into nonconsecutive Fibonacci numbers f1+f2+ ... Given a positive integer n, r...

4ヶ月 前

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Investigate the frequency of last digits of prime numbers
The last digit of a prime number greater than 5 can be 1, 3, 7, or 9. If the primes are distributed randomly, then these digits ...

4ヶ月 前