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Maximize the binary matrix by flipping submatrix once

Last Updated: 16 December 2022

Given a binary matrix of R rows and C columns. We are allowed to flip to any size of sub matrix. Flipping means changing 1 to 0 and 0 to 1. The task is to maximize the num ...read more

Dynamic Programming

Sort elements by frequency | Set 4 (Efficient approach using hash)

Last Updated: 02 June 2023

Print the elements of an array in the decreasing frequency if 2 numbers have the same frequency then print the one which came first.Examples:Input : arr[] = {2, 5, 2, 8, 5...read more

cpp-unordered_map

Minimum Perimeter of n blocks

Last Updated: 16 February 2023

We are given n blocks of size 1 x 1, we need to find the minimum perimeter of the grid made by these blocks.Examples :Input : n = 4Output : 8Minimum possible perimeter wit...read more

Basic Coding Problems

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How to make Mergesort to perform O(n) comparisons in best case?

Last Updated: 18 September 2023

As we know, Mergesort is a divide and conquer algorithm that splits the array to halves recursively until it reaches an array of the size of 1, and after that it merges so ...read more

Check if there is a cycle with odd weight sum in an undirected graph

Last Updated: 19 July 2022

Given a weighted and undirected graph, we need to find if a cycle exist in this graph such that the sum of weights of all the edges in that cycle comes out to be odd.Examp...read more

graph-connectivity

Scheduling priority tasks in limited time and minimizing loss

Last Updated: 14 March 2023

Given n tasks with arrival time, priority and number of time units they need. We need to schedule these tasks on a single resource. The objective is to arrange tasks such ...read more

Check if a number is power of 8 or not

Last Updated: 21 June 2022

Given a number check whether it is a power of 8 or not.Examples :Input : n = 64Output : YesInput : 75Output : NoRecommended PracticeCheck if a Integer is power of 8 or not ...read more

Median of Stream of Running Integers using STL

Last Updated: 02 June 2023

Given that integers are being read from a data stream. Find the median of all the elements read so far starting from the first integer till the last integer. This is also ...read more

Order-Statistics

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