Valid Parentheses - Stack - C++ - Leetcode 20

In this video, we are going to look at one of the most fundamental questions of Stack: Valid Parantheses. Description: Given a string s containing just the characters ’(’, ’)’, ’{’, ’}’, ’[’ and ’]’, determine if the input string is valid. An input string is valid if: Open brackets must be closed by the same type of brackets. Open brackets must be closed in the correct order. Link: Applications of stack: Stacks can be used to check for the balancing of paranthesis in an expression. Redo-undo features at many places such as editors, photoshop, etc. Forward and backward feature in web browsers. In this video, you’ll also learn about asymptotic notations, they are basically mathematical notations which represent order of growth of a ... #ProgrammingKnowledge #Data_Structures_And_Algorithms #Data_Structures #algorithm #Algorithms #Algorithms_Tutorial #Data_Structures_Tutorial #Arrays #Strings #Stacks 20220808 9fk5yZna2Bk