We are given an array arr[] = { 1, 2, 3, 4, 5, 6, 7 } and need to right rotate it by k positions. In right rotation, we take elements from the end of the array and move them to the first, one by on...

Given an array arr[] = { 1, 0, 2, 3, 2, 0, 0, 4, 5, 1}, We need to move all the zeros to the end of the array. After moving all the zeros, the array will be: { 1, 2, 3, 2, 4, 5, 1, 0, 0, 0 } Brut...

We are given an array arr[] = { 1, 2, 3, 4, 5, 6, 7 } and need to left rotate it by k positions. In left rotation, we take elements from the beginning of the array and move them to the end, one by ...

Below is a collection of array-related problems along with their solutions and corresponding notes, all taken from Striver’s DSA playlist. Problem Name with Links Notes Link ...

Given an array arr[] = { 1, 2, 3, 4, 5 }, we have to left rotate the array by one place. To rotate the array to the left by one position, we can directly modify the given array without using extra ...

Given a sorted array arr[] = { 1, 1, 2, 2, 2, 3, 3 }, we need to remove duplicate elements from the array while keeping only the unique elements. The modified array should contain these unique elem...

We are given two arrays: arr1[] = { 1, 2, 2, 3, 3, 4 }; arr2[] = { 1, 2, 1, 3, 4 }; We have to check whether the arrays are sorted in non-decreasing order or not. Analysis of Arrays: In the f...

Given an array arr[] = { 1, 2, 4, 7, 7, 5 }, we have to find the second largest element. Brute Force Approach: We can sort the array. After sorting, the largest element will be at the last positi...

📝 Note What is the maximum size of an array we can define? If an array is declared inside the main function, its maximum size is approximately 106. However, If the array is declared globally,...

Introduction Stress testing checks if our code works under extreme conditions. A Bash script creates test cases and compares outputs, while C++ code generates random inputs. Together, they help fi...