Competitive programming questions

@competitive_programming_question

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Solving competitive Programming Questions one day at a time.
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https://t.me/competitive_programming_question
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Competitive programming questions

29 Mar 2021, 12:51

Paid technical writer opportunity for www.prodevelopertutorial.com website. Fill out below form if interested

https://forms.gle/3eYeHvZoFpPEFskP9

Paid Technical Writer

Need technical writer for www.ProDeveloperTutorial.com website. Below are the required details: 1. It is a paid opportunity. 2. Articles will be published in your name in www.prodevelopertutorial.com website. 3. Articles should be end to end and should be easy to understand. 4. You should not copy...

1.4k 0 0

Competitive programming questions

3 Mar 2021, 06:38

Day 35 Question: Rain water trapping in C++

Given *n* non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining.
Input: [0,1,0,2,1,0,1,3,2,1,2,1]

Output: 6

Before solving this problem, please take a look at “Container with most water (https://www.prodevelopertutorial.com/find-the-container-with-most-water-explanation-with-diagram-and-solution-in-cpp-language/)” problem. There I have explained in detail, how two pointers work.

Solution:
https://www.prodevelopertutorial.com/rain-water-trapping-in-c/

Find the Container with Most Water explanation with diagram and solution in cpp language - ProDeveloperTutorial.com

You are given non negative integers "i" represents x axis, and "a" represents y axis. "n" vertical lines are drawn, find two lines together x axis that forms

39.8k 0 26

Competitive programming questions

1 Mar 2021, 06:28

Group Anagrams when given an array of strings in C++

Example:

Input: ["eat", "tea", "tan", "ate", "nat", "bat"],

Output:
[
["ate","eat","tea"],
["nat","tan"],
["bat"]
]
This problem can be solved easily using Maps.
The solution involves 2 steps:
1. Sort the element and make it as the key.
2. Take the value and place it in the key.
Solution:
https://www.prodevelopertutorial.com/group-anagrams-in-c/

Group Anagrams when given an array of strings in C++ - ProDeveloperTutorial.com

This problem can be solved easily using Maps.

32.2k 0 9

Competitive programming questions

24 Feb 2021, 08:05

Day 33 Question: Given an n x n 2D matrix rotate it by 90 degrees (clockwise) in C++ in place

You have to rotate the image in-place (https://en.wikipedia.org/wiki/In-place_algorithm), which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the rotation.
Example 1:

Given input matrix =

[
[1,2,3],
[4,5,6],
[7,8,9]
],

rotate the input matrix in-place such that it becomes:

[
[7,4,1],
[8,5,2],
[9,6,3]
]
Solution:
https://www.prodevelopertutorial.com/given-an-n-x-n-2d-matrix-rotate-it-by-90-degrees-clockwise-in-c-in-place/

Buy the book:
https://www.instamojo.com/aj_guides/ajs-guide-to-algorithm-and-data-structure-in/

In-place algorithm

In computer science, an in-place algorithm is an algorithm which transforms input using no auxiliary data structure. However, a small amount of extra storage space is allowed for auxiliary variables. The input is usually overwritten by the output as the algorithm executes. In-place algorithm updates...

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