Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.

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Can you solve this real interview question? Valid Parentheses - Given a string s containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid …

Can you solve this real interview question? Climbing Stairs - You are climbing a staircase. It takes n steps to reach the top. Each time you can either climb 1 or 2 steps. In how many distinct …

Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.

A really brute force way would be to search for all possible pairs of numbers but that would be too slow. Again, it's best to try out brute force solutions just for completeness. It is from these …

Must-do List for Interview Prep

Can you solve this real interview question? Minimum Window Substring - Given two strings s and t of lengths m and n respectively, return the minimum window substring of s such that every …