Design a stack that returns the minimum element in constant time.
Problem Statement: You need to design a stack that returns the minimum element from the stack in constant time. Solution For solving this…
Convert Postfix to Infix
Problem Statement: Given an infix expression, convert into postfix expression. Infix expression: a op b Postfix expression: a b op Solution In…
Linked List: Odd Even Linked List
Problem Statement: Given a singly LL group all odd nodes together followed by the even nodes. We need the node number not the value in the…
Searching and Sorting: Find the smallest and second smallest elements in an array
Problem Statement: You are given an unsorted array. You need to find the first and second smallest element in that unsorted array. You need to…
Matrix: Find pair with maximum sum in the matrix.
Problem Statement: You are given a matrix arr[n][n]. You need to find the sum of pair with max sum. Example Input : mat[N][M] = {{1, 2, 3, 4},…
Strings: Second most repeated word in a sequence
Problem Statement: You are given a strings, your task is to find the second most repeated string in the given sequence. Example Input :…
Strings: Given a string convert into its equivalent ASCII form
Problem Statement: Given a string convert into its equivalent ASCII format. Example Input : hello, world! Output :…
Strings: Remove all consecutive duplicates from the string
Problem Statement: Given a string, remove all the consecutive duplicates Example Input : aaaaabbbbbb Output : ab Solution Solution is very…
Arrays: Program to check if an Array is Palindrome or not
Problem Statement: Given an unsorted array, check if it is palindrome array or not. Example: arr[] = {1, 2, 0, 2, 1} Output: Palindrome…
Arrays: Find triplet with minimum sum
Problem Statement: Given an unsorted array, you need to find 3 elements whose sum is the minimum. Example: arr = {-1, 2, 3, -2}; Output: -1…
