Is Empty

Easy Stack: Array Implementation

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Problem Statement

Write a C program to check whether an array-based stack is empty (print 1 if empty, 0 otherwise).

Input Format

An integer flag (0 for empty stack, 1 for non-empty stack with sample data).

Output Format

Print 1 if top == -1, else 0.

Constraints

Flag is 0 or 1

Sample Output

Explanation

Check if the stack's top index equals -1.

Starter Code

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

#define MAX 100

struct Stack {
    int arr[MAX];
    int top;
};

int main() {
    int flag;
    if (scanf("%d", &flag) == 1) {
        struct Stack s;
        s.top = -1;
        if (flag == 1) {
            s.top++;
            s.arr[s.top] = 10;
        }
        // Write your code here to check if stack is empty
    }
    return 0;
}

Limits

Time Limit: 1s
Memory Limit: 256MB

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