Hazrat Ali - Problem Solving

Recent Articles

Sep 13, 2025 • Codeforces

Mike has a string s consisting of only lowercase English letters. He wants to change exactly one character from the string so that the resulting

Sep 13, 2025 • Leetcode

Suppose we have a file system that stores both files and directories. An example of one system is represented in the following picture

Sep 13, 2025 • Codechef

Chef is hungry and wants to reach home.

Sep 12, 2025 • Codechef

Om has X rupees. He wants to gift a laptop worth N rupees to his girlfriend.

Sep 12, 2025 • Leetcode

Convert a non-negative integer num to its English words representation.

Sep 12, 2025 • Codeforces

Each day in Berland consists of n hours. Polycarp likes time management