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First Repeating Element in an Array (C++)
Why My First Approach Was Wrong — and How I Fixed It Problem Clarification Very Important The task is to find the element whose first occurrence index is small...
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Two Pointers (Opposite Ends)
Overview This pattern uses two pointers that start from opposite ends of a data structure array or string and move toward each other. It is mainly used when: -...
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1390. Four Divisors
Problem Statement Given an integer array nums, return the sum of divisors of the integers in that array that have exactly four divisors. If there is no such in...
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Kth Largest Element in C++
🧩 Problem Statement Given an array and an integer k, find the k‑th largest element. Example - Input: 3, 2, 1, 5, 6, 4, k = 2 - Output: 5 🧠 My First Thought:...
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Weekly Challenge: New Year, New Challenges
Happy New Years everyone. Each week Mohammad S. Anwar sends out The Weekly Challengehttps://theweeklychallenge.org/, a chance for all of us to come up with solu...
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🎯 Beginner-Friendly Guide 'N-Repeated Element in Size 2N Array' – LeetCode 961 (C++ | Python | JavaScript)
Problem Description You are given an array nums of length 2N. The array contains N + 1 unique elements, and exactly one of those elements appears N times. Goal...
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66. Plus One
Problem Description You are given a large integer represented as an integer array digits, where each digitsi is the iᵗʰ digit of the integer. The digits are or...
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135. Candy | LeetCode | Top Interview 150 | Coding Questions
Problem Link https://leetcode.com/problems/candy/https://leetcode.com/problems/candy/ !leetcode 135https://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfi...
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134. Gas Station | LeetCode | Top Interview 150 | Coding Questions
Problem Link https://leetcode.com/problems/gas-station/https://leetcode.com/problems/gas-station/ !leetcode 134https://media2.dev.to/dynamic/image/width=800%2C...
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238. Product of Array Except Self | LeetCode | Top Interview 150 | Coding Questions
Problem Link https://leetcode.com/problems/product-of-array-except-self/https://leetcode.com/problems/product-of-array-except-self/ !leetcode 238https://media2...
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Coding Challenge Practice - Question 77
Problem Description Implement a function that finds the integer that appears only once in an array where every other integer appears exactly twice. Solution Ex...
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3531. Count Covered Buildings
Problem Description You are given a positive integer n, representing an n × n city. You are also given a 2D array buildings, where buildingsi = x, y denotes a...