AtCoder Regular Contest 078

Submission #1435145

Source codeソースコード

fn dfs(u: usize, p: usize, depth: &mut Vec<usize>, parent: &mut Vec<usize>, next: &Vec<Vec<usize>>) {
    for &v in &next[u] {
        if v != p {
            depth[v] = depth[u] + 1;
            parent[v] = u;
            dfs(v, u, depth, parent, next);
        }
    }
}
fn cnt(u: usize, p: usize, next: &Vec<Vec<usize>>) -> usize {
    next[u].iter().filter(|&v| *v != p).map(|&v| cnt(v, u, next)).sum::<usize>() + 1
}
fn main() {
    let n: usize = readln();
    let ps: Vec<(usize, usize)> = readlns(n-1);
    let mut next: Vec<Vec<usize>> = vec![vec![]; n];
    for (a, b) in ps {
        next[a-1].push(b-1);
        next[b-1].push(a-1);
    }
    let mut parent: Vec<usize> = vec![0; n];
    let mut depth: Vec<usize> = vec![0; n];
    parent[0] = 0;
    depth[0] = 0;
    dfs(0, 0, &mut depth, &mut parent, &next);
    let c = (depth[n-1] - 1) / 2;
    let mut root = n-1;
    for i in 0..c {
        root = parent[root];
    }
    let b = cnt(root, parent[root], &next);
    let a = n - b;
    println!("{}", if a <= b { "Snuke" } else { "Fennec" });
}

// --- template ---
#[allow(unused_imports)]
use std::cmp::{max, min};
#[allow(unused_imports)]
use std::collections::HashSet;


pub trait FromLn {
    fn fromln(s: &str) -> Self;
}
pub fn readln<T: FromLn>() -> T {
    let mut buf = String::new();
    let _ = ::std::io::stdin().read_line(&mut buf).unwrap();
    T::fromln(buf.trim())
}
pub fn readlns<T: FromLn>(n: usize) -> Vec<T> {
    let mut vs = vec![];
    for _ in 0..n { vs.push(readln()); }
    vs
}
macro_rules! fromln_primitives {
    ($($t:ty),*) => { $(
        impl FromLn for $t {
            fn fromln(s: &str) -> $t {
                s.parse().unwrap()
            }
        }
    )* }
}
fromln_primitives!(String, bool, f32, f64, isize, i8, i16, i32, i64, usize, u8, u16, u32, u64);
impl<T> FromLn for Vec<T> where T: FromLn {
    fn fromln(s: &str) -> Vec<T> {
        s.split_whitespace().map(T::fromln).collect()
    }
}
impl FromLn for Vec<char> {
    fn fromln(s: &str) -> Vec<char> {
        s.chars().collect()
    }
}
macro_rules! fromln_tuple {
    ($($t:ident),*) => {
        impl<$($t),*> FromLn for ($($t),*) where $($t: FromLn),* {
            fn fromln(s: &str) -> ($($t),*) {
                let mut it = s.split_whitespace();
                let t = ($($t::fromln(it.next().unwrap())),*);
                assert_eq!(it.next(), None);
                t
            }
        }
    }
}
fromln_tuple!(A, B);
fromln_tuple!(A, B, C);
fromln_tuple!(A, B, C, D);
fromln_tuple!(A, B, C, D, E);
fromln_tuple!(A, B, C, D, E, F);

Submission

Task問題 D - Fennec VS. Snuke
User nameユーザ名 くコ:彡
Created time投稿日時
Language言語 Rust (1.15.1)
Status状態 AC
Score得点 400
Source lengthソースコード長 2660 Byte
File nameファイル名
Exec time実行時間 41 ms
Memory usageメモリ使用量 18684 KB

Compiler messageコンパイルメッセージ

warning: unused variable: `i`, #[warn(unused_variables)] on by default
--> ./Main.rs:28:9
|
28 | for i in 0..c {
| ^

Test case

Set

Set name Score得点 / Max score Cases
Sample - 00_example_01.txt,00_example_02.txt
All 400 / 400 00_example_01.txt,00_example_02.txt,01.txt,02.txt,03.txt,04.txt,05.txt,06.txt,07.txt,08.txt,09.txt,10.txt,11.txt,12.txt,13.txt,14.txt,15.txt,16.txt,17.txt,18.txt,19.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
00_example_01.txt AC 2 ms 4352 KB
00_example_02.txt AC 2 ms 4352 KB
01.txt AC 2 ms 4352 KB
02.txt AC 2 ms 4352 KB
03.txt AC 2 ms 4352 KB
04.txt AC 2 ms 4352 KB
05.txt AC 32 ms 12156 KB
06.txt AC 36 ms 14204 KB
07.txt AC 33 ms 12028 KB
08.txt AC 35 ms 14076 KB
09.txt AC 2 ms 4352 KB
10.txt AC 32 ms 10492 KB
11.txt AC 34 ms 12540 KB
12.txt AC 35 ms 12540 KB
13.txt AC 36 ms 12540 KB
14.txt AC 35 ms 12540 KB
15.txt AC 35 ms 12540 KB
16.txt AC 40 ms 18684 KB
17.txt AC 40 ms 18684 KB
18.txt AC 41 ms 18684 KB
19.txt AC 41 ms 18684 KB