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HackerRank Roads and Libraries Problem Solution in C++ | DFS Approach Explained

OJ Solutions | Aug. 19, 2025, 5:38 p.m.

Problem Overview The HackerRank Roads and Libraries problem is a classic graph problem where we need to build libraries and/or repair roads in a city to ensure that every citizen

Even Tree HackerRank Problem Solution in C++ with Step-by-Step Explanation

OJ Solutions | Aug. 19, 2025, 4:33 p.m.

Problem Overview The HackerRank Even Tree problem is a classic graph and tree problem that asks us to maximize the number of edges we can remove from a tree while

LeetCode 172 Factorial Trailing Zeroes Solution – C++ Implementation and Explanation

OJ Solutions | Aug. 16, 2025, 5:23 p.m.

Problem Overview In LeetCode 172: Factorial Trailing Zeroes, we are asked to find the number of trailing zeros in a factorial of a given number n. This problem is a

LeetCode 3163 String Compression III Solution – C++ Implementation and Explanation

OJ Solutions | Aug. 14, 2025, 6:15 p.m.

Problem Overview In LeetCode 3163: String Compression III, we are asked to compress a string by replacing consecutive repeated characters with a count followed by the character. One important detail

LeetCode 185 Department Top Three Salaries Solution – SQL Query Explained

OJ Solutions | Aug. 14, 2025, 5:46 p.m.

Problem Overview LeetCode 185: Department Top Three Salaries asks us to find the employees who earn one of the top three highest distinct salaries in each department. We are given