LeetCode Daily Challenge-3477. Fruits Into Baskets II(Easy, O(n²))
Unavoidable O(n²) - Optimal Solution in Python, Java, Golang, C, C#, C++
Aug 5, 20254 min read3
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Articles tagged with #leetcode-easy
LeetCode Daily Challenge-2210 Count Hills and Valleys in an Array(Easy, Two Pointers, O(n))
Problem Description LeetCode 2210 asks us to count the number of hills and valleys in an array. A hill is an element that is strictly greater than its neighbors, while a valley is an element that is strictly smaller than its neighbors. The key challe...
Jul 27, 20254 min read2
LeetCode 160 Intersection of Two Linked Lists - Four Complete Solutions (Easy, Java, O(n))
From Brute Force to Mathematical Elegance: A Comprehensive Approach Analysis
Jul 13, 20255 min read2
LeetCode 2006 Count Number of Pairs With Absolute Difference K - From brute force O(n²) to optimal O(n) using frequency array (Easy, Java, O(n))
This is an optimized frequency-based solution for counting pairs with absolute difference `k`.
Jul 12, 20254 min read1
LeetCode 1909. Remove One Element to Make the Array Strictly Increasing - Optimal solution by analyzing possible cases and find patterns (Java, O(n))
The algorithm works by counting violations first, then checking if the violations can be fixed by removing exactly one element.
Jul 12, 20254 min read1
LeetCode 326 Power of Three - Step by Step Breakdown(Easy, Java, O(n))
LeetCode 326. Power of Three This code determines whether a given integer n is a power of three. A power of three is any integer that can be expressed as (3^k) where (k) is a non-negative integer (e.g., (3^0 = 1), (3^1 = 3), (3^2 = 9), etc.). Step-b...
Jul 10, 20254 min read2