Given string num representing a non-negative integer num, and an integer k, return the smallest possible integer after removing k digits from num. Here’s the [Problem…
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We are given an array asteroids of integers representing asteroids in a row. The indices of the asteriod in the array represent…
Given an array of integers arr, find the sum of min(b), where b ranges over every (contiguous) subarray of arr. Since the answer may…
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap…
Given a circular integer array nums (i.e., the next element of nums[nums.length – 1] is nums[0]), return the next greater number for every element in nums. Here’s the [Problem…
Given an array arr[ ] of integers, the task is to find the next greater element for each element of the array…
Postfix, prefix, and infix are three common notations used to write arithmetic expressions. In infix notation, the operator is placed between…
If you want to master stack-related challenges and ace your coding interviews, understanding how to implement a Min Stack is crucial. This…
The Valid Parentheses problem is a classic interview question to check your understanding of stacks and string parsing. It evaluates whether a…
Implementing a Queue using a Linked List is a foundational data structure exercise with widespread use in real-world computing and interview questions.…