Zig-Zag Pattern

Given an integer N, print a 3-row zig-zag wave of length N where stars appear at wave peaks and troughs according to modular indexing: (row + col) % 4 == 0 or (row == 2 && col % 4 == 0).

Input Format

A single integer N denoting the number of columns (N >= 5).

Output Format

Print 3 rows forming the zig-zag wave.

Constraints:5 <= N <= 30

Concepts Required:

Modular periodic wave function3-row coordinate mapping

Expected Pattern PreviewASCII Monospace

  *   *
 * * * *
*   *   *

Notice how character spacing and row counts scale systematically based on the input N.

Concrete Examples

Example 1

Input:

Output:

  *   *  
 * * * * 
*   *   *

Explanation: A 3-row zig-zag wave oscillating with period 4.

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