rustgym 0.2.0

rustgym solutions
Documentation 
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

struct Solution;
use std::cmp::Ordering::*;

impl Solution {
    fn max_turbulence_size(a: Vec<i32>) -> i32 {
        let n = a.len();
        let mut res = 1;
        let mut inc = 1;
        let mut dec = 1;
        for i in 1..n {
            match (a[i] - a[i - 1]).cmp(&0) {
                Equal => {
                    inc = 1;
                    dec = 1;
                }
                Less => {
                    inc = dec + 1;
                    dec = 1;
                }
                Greater => {
                    dec = inc + 1;
                    inc = 1;
                }
            }
            res = res.max(inc.max(dec));
        }
        res
    }
}

#[test]
fn test() {
    let a = vec![9, 4, 2, 10, 7, 8, 8, 1, 9];
    let res = 5;
    assert_eq!(Solution::max_turbulence_size(a), res);
    let a = vec![4, 8, 12, 16];
    let res = 2;
    assert_eq!(Solution::max_turbulence_size(a), res);
    let a = vec![100];
    let res = 1;
    assert_eq!(Solution::max_turbulence_size(a), res);
    let a = vec![100, 100, 100];
    let res = 1;
    assert_eq!(Solution::max_turbulence_size(a), res);
}