Practice Challenge

Hard Stack: Applications PRO

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Problem Statement

Write a C program to implement a stack-based arithmetic calculator that evaluates expressions with parentheses and standard operator precedence.

Input Format

A valid arithmetic expression string.

Output Format

Print the final evaluated integer result.

Constraints

1 <= string length <= 100

Sample Input

3+5*2

Sample Output

Explanation

Convert infix expression to postfix using a stack and evaluate the resulting postfix expression to compute the final value.

Starter Code

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

int main() {
    char expr[100];
    if (scanf("%s", expr) == 1) {
        // Write your code here for stack practice challenge calculator
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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