Stack: Given 2 arrays, check if an array is stack permutation of another
Problem Statement: You are given 2 array of same size and the elements are unique. You need to check if a[] is a stack permutation of b[]. You…
Stack: Stock Span Problem
Problem Statement: You are given an array, that represents the stock of the ith day. You need to return the stock span for the ith day, i.e…
Stack: Given a string expression, check if it is balanced expression
Problem Statement: You are given a string that has braces of types “{ }”, “[ ]”, “( )”. In some places it…
Stack: Merge and sort 2 unsorted array
Problem Statement: Merge and sort 2 unsorted array Example: Input: s1 = {4, 3, 2} s2 = {7, 6} Output: {2, 3, 4, 6, 7} Solution : Take a temp…
Stack: Check if valid parentheses in an expression
Problem Statement: Given a string “s” contains various types of brackets. You need to check if the brackets are balanced or not.…
Stack: Check if concatenation of two strings is balanced or not
Problem Statement: You are given 2 bracket sequence S1 and S2. You need to check if the string obtained by concatenating both sequence is…
Stack: Check if an array is stack sortable
Problem Statement: You are given an array with unique elements between 1 to n, you need to check if the array is stack sortable. An array is…
Stack: Check if a queue can be sorted into another queue using a stack
Problem Statement: You are given a queue having first n natural numbers. You need to check if the given queue elements can be arranged in…
Stack: Check if the expression contains redundant bracket or not
Problem Statement: You are given a string, you need to check if the string contains redundant parenthesis or not Example: Input : ((a + b))…
Stack: Check if stack elements are pairwise consecutive
Problem Statement: Given a stack of integers, you need to check if the stack is pairwise consecutive or not. The pairs can be increasing and…