42. Trapping Rain Water
Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it can trap […]
41. First Missing Positive
Given an unsorted integer array nums. Return the smallest positive integer that is not present in nums. You must implement an algorithm that runs in O(n) time and
Summed Matrix
A matrix is constructed of size n*n and given an integer ‘q’. The value at every cell of the matrix is given as, M(i,j)
19. Remove Nth Node From End of List
Given the head of a linked list, remove the nth node from the end of the list and return its head. Example 1: Input:
Print Bracket Number
Given a string str, the task is to find the bracket numbers, i.e., for each bracket in str, return i if the bracket
1438. Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit
Given an array of integers nums and an integer limit, return the size of the longest non-empty subarray such that the absolute difference between any
Extract the Number from the String
Given a sentence containing several words and numbers. Find the largest number among them which does not contain 9. If no
1248. Count Number of Nice Subarrays
Given an array of integers nums and an integer k. A continuous subarray is called nice if there are k odd numbers on it. Return the number of nice sub-arrays.
1052. Grumpy Bookstore Owner
There is a bookstore owner that has a store open for n minutes. Every minute, some number of customers enter the store.
Compare two fractions
You are given a string str containing two fractions a/b and c/d, compare them and return the greater. If they are equal,
1552. Magnetic Force Between Two Balls
In the universe Earth C-137, Rick discovered a special form of magnetic force between two balls if they are put
Integral Points Inside Triangle
Given three non-collinear points whose co-ordinates are p(p1, p2), q(q1, q2) and r(r1, r2) in the X-Y plane. Return the number of integral / lattice