Arrays

In this section we will see basics of Arrays and practice problems including Rotations, Arrangement, Rearrangement, Order, Range Searching and Sorting, Matrix etc.
Two Sum - return index of a pair of array elements with a given sum

Posted on Mar 31, 2024

Find maximum and minimum element of an array

Posted on Mar 31, 2024

Move all negative numbers to beginning of the array

Posted on Mar 31, 2024

Segregate 0s and 1s in an array (Sort an array of 0s and 1s)

Posted on Mar 31, 2024

Segregate 0s, 1s and 2s in an array (Sort an array of 0s, 1s and 2s)

Posted on Mar 31, 2024

Program to right rotate an array by 'k' elements

Posted on Mar 31, 2024

Find duplicates in O(n) time and O(1) extra space

Posted on Mar 31, 2024

Find duplicates in O(n) time and O(n) extra space.

Posted on Mar 31, 2024

Alternating +ve & -ve in array in O(1) time (maintaining order)

Posted on Mar 31, 2024

Print all possible permutations of an Array in O(1) space

Posted on Mar 31, 2024