Task 3 was revealed 2.4.2025 at 18:00 CET
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Available from 02.04.2025 18:00 CET until 03.04.2025 17:59 CET - You can get 3 points
The Lunar Codex Treasure
Story:
Deep within the archives of an ancient Minoan civilization, an encrypted message has been discovered.
Scholars believe it contains instructions leading to a powerful artifact.
However, the message has been deeply encoded using an ancient technique, and additional layers of obscurity were added to deter intruders.
Legends speak of a forgotten order that used multiple shifts within the same message, complicating decryption.
Your task is to find all keys and uncover the secret hidden in the text itself.
Goals:
- Write a function that reads an encoded message from a file and deciphers it.
- Within the challenge description itself lies a hidden clue that will help uncover the pattern.
Input:
- The input.txt file containing an encoded message. The message may span multiple lines.
- The length of the message does not exceed 10^4 characters.
- Each decrypted message is used as an input in the next round.
Output:
- The decrypted message.
- The responses should have some readable clue.
Example:
- phtajvbuavutl -> iamtcountonme
Hints:
- The first value corresponds to an important lunar cycle (between 1 and 30).
- After the initial value, subsequent characters may have increasing or decreasing values in a pattern.
- Each message found may contain a clue for the next value.
- Consider frequency analysis if the pattern is not immediately obvious.
- Keys are numerical.
Solution Format:
- The solution should be a function that reads the file, applies the appropriate keys, and prints the decoded text.
- It should prompt the user to continue uncovering clues until it reveals the true message.
Resolution:
- Find all values that decrypt the file and print them each one in a new line.
- Copy the values and past it to the appropriate textbox in submission page.
Your task:
Read input file and into the field with the answer, enter :
• the resulting value
• the country, which the story refers to
• at the end paste the source code of your program.
Click here to download CGW Task 3 Input file
Answer:
Click here to download Answer to Task 3
Scoring system:
|
Points for |
Correct answer |
Country |
Source Code |
|
Round 1 |
1 |
1 |
1 |
|
Round 2 |
2 |
1 |
1 |
|
Round 3 |
3 |
1 |
1 |
|
Round 4 |
4 |
1 |
1 |
|
Round 5 |
5 |
1 |
1 |
|
Bonus points for |
Quick and correct answer |
||||||||
|
Round 1 |
5 |
4 |
3 |
2 |
1 |
||||
|
Round 2 |
6 |
5 |
4 |
3 |
2 |
1 |
|||
|
Round 3 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
||
|
Round 4 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
|
|
Round 5 |
9 |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |