blob: e9ea35fd93f19c12e7c5379ac407a7d9b2262366 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
--- Day 4: Secure Container ---
You arrive at the Venus fuel depot only to discover it's protected by a password. The Elves had
written the password on a sticky note, but someone threw it out.
However, they do remember a few key facts about the password:
- It is a six-digit number.
- The value is within the range given in your puzzle input.
- Two adjacent digits are the same (like 22 in 1[1m[97m22[0m345).
- Going from left to right, the digits [1m[97mnever decrease[0m; they only ever increase or stay the same
(like 111123 or 135679).
Other than the range rule, the following are true:
- 111111 meets these criteria (double 11, never decreases).
- 2234[1m[97m50[0m does not meet these criteria (decreasing pair of digits 50).
- 123789 does not meet these criteria (no double).
[1m[97mHow many different passwords[0m within the range given in your puzzle input meet these criteria?
|
