#!/usr/bin/env python3
"""
Solution for task 6997111cd6d3a5544a3deffd.
This file contains a minimal example implementation.
"""

def greet(name: str) -> str:
    """Return a greeting message for the given name."""
    return f"Hello, {name}!"

if __name__ == "__main__":
    import sys
    if len(sys.argv) > 1:
        print(greet(sys.argv[1]))
    else:
        print("Usage: python main.py <name>")