Nhut Nguyen
Nhut Nguyen

Nhut Nguyen

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Coding Challenges

In this series, I share how to solve and implement a coding challenge in C++. The problems are picked from LeetCode.com. You can also find my public code at https://github.com/ntnhut/LeetSolve.

Articles in this series

How to solve Leetcode 1396. Design Underground System

May 2, 20225 min read 104 views

A simple C++ class · Problem statement An underground railway system is keeping track of customer travel times between different stations. They are using...

How to solve Leetcode 1396. Design Underground System

How to solve Leetcode 706. Design HashMap

Apr 22, 20223 min read 58 views

A simple implementation of a hashmap · Problem statement Design a HashMap without using any built-in hash table libraries. Implement the MyHashMap...

How to solve Leetcode 706. Design HashMap

How to solve Leetcode 923. 3Sum With Multiplicity

Apr 6, 20223 min read 32 views

Problem statement Given an integer array arr, and an integer target, return the number of tuples i, j, k such that i < j < k and arr[i] + arr[j] +...

How to solve Leetcode 923. 3Sum With Multiplicity

A Solution to Leetcode 344. Reverse String

Apr 1, 20221 min read 61 views

Problem statement Write a function that reverses a string. The input string is given as an array of characters s. You must do this by modifying the...

A Solution to Leetcode 344. Reverse String

Solutions to Leetcode 35. Search Insert Position

Mar 31, 20222 min read 24 views

Problem statement Given a sorted array of distinct integers and a target value, return the index if the target is found. If not, return the index...

Solutions to Leetcode 35. Search Insert Position

A Solution to Leetcod 74. Search a 2D Matrix

Mar 30, 20222 min read 22 views

Problem statement Write an efficient algorithm that searches for a value target in an m x n integer matrix matrix. This matrix has the following...

A Solution to Leetcod 74. Search a 2D Matrix