blob: f4834207785fbc3a2cccaee72cd0d3a6705bf831 (
plain)
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
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
use std::collections::VecDeque;
use std::str::FromStr;
pub struct SyntaxLines {
lines: Vec<String>,
}
impl FromStr for SyntaxLines {
type Err = ();
fn from_str(input: &str) -> Result<Self, Self::Err> {
let lines: Vec<_> = input
.trim()
.split('\n')
.map(|x| x.to_owned())
.collect::<Vec<String>>();
Ok(SyntaxLines { lines })
}
}
impl SyntaxLines {
pub fn part1(&self) -> u32 {
let mut result: u32 = 0;
for line in &self.lines {
let mut qopen = VecDeque::new();
let mut panic_char = ' ';
for character in line.chars() {
match character {
c if character == '('
|| character == '['
|| character == '{'
|| character == '<' =>
{
qopen.push_back(c);
}
c if character == ')'
|| character == ']'
|| character == '}'
|| character == '>' =>
{
match qopen.pop_back() {
Some(bracket) => {
let mut error = false;
if c == ')' && bracket != '(' {
error = true;
} else if c == ']' && bracket != '[' {
error = true;
} else if c == '}' && bracket != '{' {
error = true;
} else if c == '>' && bracket != '<' {
error = true;
}
if error {
panic_char = c;
}
}
None => panic!("Wtf?"),
};
}
_ => {}
};
if panic_char != ' ' {
if panic_char == ')' {
result += 3;
} else if panic_char == ']' {
result += 57;
} else if panic_char == '}' {
result += 1197;
} else if panic_char == '>' {
result += 25137;
}
break;
}
}
}
result
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_example() {
let input: SyntaxLines = include_str!("../example.txt").parse().unwrap();
let result = input.part1();
assert_eq!(result, 26397);
}
#[test]
fn test_puzzle_input() {
let input: SyntaxLines = include_str!("../input.txt").parse().unwrap();
let result = input.part1();
assert_eq!(result, 392367);
}
}
|
