Valid Parentheses

Medium Stack: Applications PRO

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Problem Statement

Write a C program using a stack to check if a given string of parentheses ‘(‘, ‘)’, ‘{‘, ‘}’, ‘[‘ and ‘]’ is balanced (print 1 if valid, 0 otherwise).

Input Format

A string containing parenthesis characters.

Output Format

Print 1 if balanced, else 0.

Constraints

1 <= string length <= 100

Sample Input

{[()]}

Sample Output

Explanation

Push opening brackets onto the stack. For each closing bracket, check if it matches the top of the stack and pop; if unmatched or stack is unbalanced, return 0.

Starter Code

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() {
    char str[100];
    if (scanf("%s", str) == 1) {
        // Write your code here to check valid parentheses using a stack
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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