Technique for mapping data to a fixed-size value, often used for efficient data retrieval and storage.
What is an unordered_map in STL? unordered_map in STL are associative containers where each element consists of a key value and a mapped value. Two mapped values cannot have the same key value. The...
Problem Statement: Given an array and a sum k, we need to print the length of the longest subarray that sums to k. Examples Example 1: Input Format: N = 3, k = 5, array[] = {2,3,5} Result: 2 Explan...
Problem Statement: Given an array of integers and an integer k, return the total number of subarrays whose sum equals k. A subarray is a contiguous non-empty sequence of elements within an array. E...
Problem Statement: Given a non-empty array of integers arr, every element appears twice except for one. Find that single one. Examples Example 1: Input Format: arr[] = {2,2,1} Result: 1 Explanation...
Problem Statement: Problem Statement: Given an array of size N. Find the highest and lowest frequency element. Examples Example 1: Input: array[] = {10,5,10,15,10,5}; Output: 10 15 Explanation: The...
What is map in C++ STL? map in STL are associative containers where each element consists of a key value and a mapped value. Two mapped values cannot have the same key value. Syntax: map<object_...
Problem Statement: Given a sorted binary array (consisting of only 0’s and 1’s), the task is to find the total number of 1’s in the given array. Examples Example 1: Input: [0,0,0,1,1] Output:...
v Problem Statement: Given two binary arrays arr1[] and arr2[] of same size N. Find length of the longest common span [i, j] where j>=i such that arr1[i] + arr1[i+1] + …. + arr1[j] = arr2[i] + ar...
Problem Statement: Given an array of integers and a number K. Find the count of distinct elements in every window of size K in the array. Examples Example 1: Input: K=4, array[] = {1,2,1,3,4,2,3} O...
Problem Statement: Given two sorted arrays, arr1, and arr2 of size n and m . Find the union of two sorted arrays. The union of two arrays can be defined as the common and distinct elements in the t...
