Is Empty

Easy Queue: Array Implementation

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Problem Statement

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

Input Format

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

Output Format

Print 1 if front > rear, else 0.

Constraints

Flag is 0 or 1

Sample Output

Explanation

Check if front > rear to determine if the queue contains no elements.

Starter Code

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

#define MAX 100

struct Queue {
    int arr[MAX];
    int front;
    int rear;
};

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

Limits

Time Limit: 1s
Memory Limit: 256MB

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