Previous Next
0 / 33
Module DEMO-32-60DEMO-C-32

Hollow Butterfly

DEMO-C-32 • Programming in C

Browser-only practice

Problem Statement

Write a program that reads an integer N and prints a hollow butterfly pattern of stars.

Constraints

1 <= N <= 20

Input Format

A single integer N (1 <= N <= 20).

Output Format

A hollow butterfly pattern.

Sample Testcases

Submit runs every public testcase in this browser. Results and code never leave this device.

Sample #1
Public sample
Input
3
Output
*    *
**  **
* ** *
**  **
*    *
Explanation
Input: 3
Sample #2
Public sample
Input
5
Output
*        *
**      **
* *    * *
*  *  *  *
*   **   *
*  *  *  *
* *    * *
**      **
*        *
Explanation
Input: 5
Sample #3
Public sample
Input
2
Output
*  *
****
*  *
Explanation
Input: 2
Sample #4
Public sample
Input
7
Output
*            *
**          **
* *        * *
*  *      *  *
*   *    *   *
*    *  *    *
*     **     *
*    *  *    *
*   *    *   *
*  *      *  *
* *        * *
**          **
*            *
Explanation
Input: 7

Web terminal

C, C++, Java, and Python run locally in a browser VM. No worker or visualizer is used.

Saved in this browser
Editor settings