Empowering coders, one solution at a time
Empowering coders, one solution at a time
There are N cities in a country. George is initially at the airport in city 1 and he wants to reach city N. For any city i, there is either a flight to city (i+1) or to (i+3) if it…
Given an array A[] of N integers. In each operation, Geek can increase the ith element by 1 (i.e set A[i] = A[i]+1 where 1 < i < N).The task is to calculate the minimum number of operations required such that there is no prefix in the array A[] whose sum…
You are given a binary string s and a positive integer k. A substring of s is beautiful if the number of 1‘s in it is exactly k. Let len be the length of the shortest beautiful substring. Return the lexicographically smallest beautiful substring of string s with length equal to len. If s doesn’t contain a beautiful substring, return an empty string. A…
Given a 0-indexed 2D integer matrix grid of size n * m, we define a 0-indexed 2D matrix p of size n * m as the product matrix of grid if the following condition is met: Return the product matrix of grid. Example 1:Input: grid = [[1,2],[3,4]] Output: [[24,12],[8,6]] Explanation: p[0][0] = grid[0][1] * grid[1][0] * grid[1][1]…
You are given a 0-indexed integer array nums having length n, an integer indexDifference, and an integer valueDifference. Your task is to find two indices i and j, both in the range [0, n – 1], that satisfy the following conditions: Return an integer array answer, where answer = [i, j] if there are two such indices, and answer =…
![[Solved] A company is transmitting data to another server Security key](https://realcoder.techss24.com/wp-content/uploads/2023/08/Solved-A-company-is-transmitting-data-to-another-server-Security-key-768x432.png "[Solved] A company is transmitting data to another server Security key")
A company needs to transmit data to another server, and to secure this data during transmission, they opt to use a security key. The security key is identified as the count of the unique repeating digits in the data. For…
![[Solved] Music Teacher with Java, CPP, Python](https://realcoder.techss24.com/wp-content/uploads/2023/07/Solved-Music-Teacher-with-Java-CPP-Python-768x432.png "[Solved] Music Teacher with Java, CPP, Python")
Music Teacher: A music teacher has developed a new technique to teach the students in which unique node is identified by a lower character of English alphabet. In total there nodes in this technique from ‘a’ to ‘z’. To teach…
![[Solved] Allens Value with Java, CPP, Python](https://realcoder.techss24.com/wp-content/uploads/2023/07/Solved-Allens-Value-with-Java-CPP-Python-768x432.png "[Solved] Allens Value with Java, CPP, Python")
Allens value: You are given an array A of N (>=3) distinct integers. Your friend Allen removes only 2 elements from this array, adds a value (> 0) to all the remaining elements, shuffles the array and leaves the newly…
![[Solved] Hurdle Race with Java, CPP, Python](https://realcoder.techss24.com/wp-content/uploads/2023/07/Solved-Hurdle-Race-with-Java-CPP-Python-768x432.png "[Solved] Hurdle Race with Java, CPP, Python")
Hurdle Race: You are participating in a hurdle race. The race comprises of stairs of varying height and there are points that can be collected after every meter. Initially, you are at height 0 and meter 0. To make the…
![[Solved] Rearrangement of Seats with Java, C++, Python](https://realcoder.techss24.com/wp-content/uploads/2023/07/Solved-Rearrangement-of-Seats-with-Java-C-Python-768x432.png "[Solved] Rearrangement of Seats with Java, C++, Python")
Rearrangement of Seats: There are N students in a class, sitting on chairs numbered from 1 to N.Initially all the students are seated serially from 1 to N. Their teacher assigns them a task wherein the students are required to…