Is Empty

Easy Deque PRO
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Problem Statement

Write a C program to check whether a deque is empty (print 1 if empty, 0 otherwise).

Input Format

An integer flag (0 for empty deque, 1 for non-empty deque).

Output Format

Print 1 if empty, else 0.

Constraints

Flag is 0 or 1

Sample Output

1

Explanation

Check if front == -1 or size == 0 to determine if the deque is empty.

Starter Code

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

int main() {
    int flag;
    if (scanf("%d", &flag) == 1) {
        int front = -1;
        if (flag == 1) front = 0;
        // Write your code here to check if deque is empty
    }
    return 0;
}

Limits

  • Time Limit: 1s
  • Memory Limit: 256MB

Embedded C Programming

Updated: March 15, 2026
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