···

       
1
       
1
       
 
       
use std::{fs, ops::ControlFlow};

     

       
2
       
2
       
 
       


     

       
3
       
3
       
 
       
fn main() {

     

       
4
       
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    let input: String = match fs::read_to_string("../input.txt") {

     

       
5
       
5
       
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        Ok(input) => input,

     

       
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6
       
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        _ => panic!("invalid input!!!"),

     

       
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7
       
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    };

     

       
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+
       
    let input = fs::read_to_string("../input.txt").expect("invalid input");

     

       
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    let input = input.trim();

     

       
9
       
6
       
 
       


     

       
10
       
7
       
 
       
    let part1 = input.chars().fold(0, |floor, v| {

     
···

       
15
       
12
       
 
       
        }) + floor

     

       
16
       
13
       
 
       
    });

     

       
17
       
14
       
 
       


     

       
18
       
18
       
-
       
    println!("{}", part1.to_string());

     

       
15
       
15
       
+
       
    println!("{}", part1);

     

       
19
       
16
       
 
       


     

       
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20
       
-
       
    let part2 = input.chars().try_fold((0, 1), |state, v| {

     

       
21
       
21
       
-
       
        let (floor, step) = state;

     

       
17
       
17
       
+
       
    let part2 = input.chars().try_fold((0, 1), |(floor, step), v| {

     

       
22
       
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        let floor = (match v {

     

       
23
       
19
       
 
       
            '(' => 1,

     

       
24
       
20
       
 
       
            ')' => -1,

     
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31
       
27
       
 
       
    });

     

       
32
       
28
       
 
       
    let part2 = match part2 {

     

       
33
       
29
       
 
       
        ControlFlow::Break(part2) => part2,

     

       
34
       
34
       
-
       
        _ => panic!("something bad happened"),

     

       
30
       
30
       
+
       
        ControlFlow::Continue(_) => panic!("bad input. never reached basement"),

     

       
35
       
31
       
 
       
    };

     

       
36
       
32
       
 
       


     

       
37
       
37
       
-
       
    println!("{}", part2.to_string());

     

       
33
       
33
       
+
       
    println!("{}", part2);

     

       
38
       
34
       
 
       
}