Data Structures

Program to Search in Row-wise and Column-wise Sorted Matrix

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Program to search in a row-wise column-wise sorted matrix i.e. printing the location of an element(if it exists) in a row and column-wise sorted matrix.

Find Repeating Element in Array| Leetcode #287

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This article will discuss various approaches to find the element repeating more than once in an array, from naive to most efficient. Problem statement: Given an array of size n where each element is in the range [1,n-1], exactly one element repeats any no. of times in the array. Find that repeating element. Input: arr = … Read more

Program to Find Square Root of an Integer Using Binary Search

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This article will discuss how to find the square root of an integer efficiently using Binary Search. If the number is a perfect square, the program should return the square root, else return the floor of the square root of the number. Before that we first discuss the naive approach to find the square root … Read more

Maximum Sum Circular Subarray | Leetcode #918

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Maximum Sum Circular Subarray this problem is variation of Maximum Sum Subarray question where we implemented the Kadane’s Algorithm. Check out our previous blog post on Kadane’s Algorithm here. Link to the current question https://leetcode.com/problems/maximum-sum-circular-subarray/ Let us consider an array {2, 1, -5, 4, -3, 1, -3, 4, 1}. So according to the problem the … Read more

Window Sliding Technique – An Efficient Technique

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The window sliding technique if helpful when you have to reduce the time complexity from O(N2) to O(N) by converting nested loop into a single loop in problems that includes linear sequences, like arrays. A window is a contiguous sequence of elements in an array and as the name suggests in the window sliding technique, … Read more

Kadane’s Algorithm – Maximum Sum Subarray

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The given task in this problem is that we have to find the series of contiguous elements with the maximum sum in any given array. You can find the problem here which is based on this algorithm. Before jumping to the Kadane’s algorithm, we will look the naive solution of this problem, and then we … Read more