diff --git a/0001_solution.py b/0001_solution.py
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--- /dev/null
+++ b/0001_solution.py
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+
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+"""
+Problem 0001: Generate 200 unique activation codes (for app or coupons)
+
+Author: Your Name
+Date: YYYY-MM-DD
+"""
+
+import random
+import string
+
+def generate_activation_code(length=12):
+    """
+    Generate a single random activation code.
+    Characters used: uppercase letters (A-Z) and digits (0-9)
+    """
+    chars = string.ascii_uppercase + string.digits
+    return ''.join(random.choices(chars, k=length))
+
+def generate_activation_codes(count=200, length=12):
+    """
+    Generate 'count' unique activation codes of given length.
+    Returns a list of unique codes.
+    """
+    codes = set()
+    while len(codes) < count:
+        codes.add(generate_activation_code(length))
+    return list(codes)
+
+def save_codes_to_file(codes, filename="activation_codes.txt"):
+    """Save all codes to a text file, one per line"""
+    with open(filename, "w") as f:
+        for code in codes:
+            f.write(code + "\n")
+    print(f"{len(codes)} activation codes saved to '{filename}'")
+
+if __name__ == "__main__":
+    # Generate 200 unique activation codes
+    codes = generate_activation_codes(count=200, length=12)
+
+    # Print codes to console with numbering
+    print("=== Activation Codes ===")
+    for i, code in enumerate(codes, start=1):
+        print(f"{i:03d}: {code}")
+
+    # Save codes to file
+    save_codes_to_file(codes)