結果
問題 | No.1221 木 *= 3 |
ユーザー | koba-e964 |
提出日時 | 2020-10-05 17:16:12 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 76 ms / 2,000 ms |
コード長 | 3,359 bytes |
コンパイル時間 | 14,927 ms |
コンパイル使用メモリ | 388,812 KB |
実行使用メモリ | 26,752 KB |
最終ジャッジ日時 | 2024-07-19 21:37:16 |
合計ジャッジ時間 | 18,299 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 1 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 1 ms
5,376 KB |
testcase_05 | AC | 1 ms
5,376 KB |
testcase_06 | AC | 1 ms
5,376 KB |
testcase_07 | AC | 73 ms
26,752 KB |
testcase_08 | AC | 75 ms
26,240 KB |
testcase_09 | AC | 74 ms
26,624 KB |
testcase_10 | AC | 75 ms
26,240 KB |
testcase_11 | AC | 76 ms
26,368 KB |
testcase_12 | AC | 63 ms
14,336 KB |
testcase_13 | AC | 61 ms
14,360 KB |
testcase_14 | AC | 64 ms
14,336 KB |
testcase_15 | AC | 66 ms
14,336 KB |
testcase_16 | AC | 65 ms
14,336 KB |
testcase_17 | AC | 71 ms
13,824 KB |
testcase_18 | AC | 71 ms
13,824 KB |
testcase_19 | AC | 70 ms
13,824 KB |
testcase_20 | AC | 70 ms
13,824 KB |
testcase_21 | AC | 71 ms
13,824 KB |
ソースコード
#[allow(unused_imports)] use std::cmp::*; #[allow(unused_imports)] use std::collections::*; use std::io::{Write, BufWriter}; // https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 macro_rules! input { ($($r:tt)*) => { let stdin = std::io::stdin(); let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock())); let mut next = move || -> String{ bytes.by_ref().map(|r|r.unwrap() as char) .skip_while(|c|c.is_whitespace()) .take_while(|c|!c.is_whitespace()) .collect() }; input_inner!{next, $($r)*} }; } macro_rules! input_inner { ($next:expr) => {}; ($next:expr, ) => {}; ($next:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($next, $t); input_inner!{$next $($r)*} }; } macro_rules! read_value { ($next:expr, [graph1; $len:expr]) => {{ let mut g = vec![vec![]; $len]; let ab = read_value!($next, [(usize1, usize1)]); for (a, b) in ab { g[a].push(b); g[b].push(a); } g }}; ($next:expr, ( $($t:tt),* )) => { ( $(read_value!($next, $t)),* ) }; ($next:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>() }; ($next:expr, chars) => { read_value!($next, String).chars().collect::<Vec<char>>() }; ($next:expr, usize1) => (read_value!($next, usize) - 1); ($next:expr, [ $t:tt ]) => {{ let len = read_value!($next, usize); read_value!($next, [$t; len]) }}; ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error")); } #[allow(unused)] macro_rules! debug { ($($format:tt)*) => (write!(std::io::stderr(), $($format)*).unwrap()); } #[allow(unused)] macro_rules! debugln { ($($format:tt)*) => (writeln!(std::io::stderr(), $($format)*).unwrap()); } const INF: i64 = 1 << 50; fn dfs(v: usize, par: usize, g: &[Vec<usize>], a: &[i64], b: &[i64], dp: &mut [i64], ep: &mut [i64]) { let mut d = 0; let mut e = a[v]; for &w in &g[v] { if w == par { continue; } dfs(w, v, g, a, b, dp, ep); d += max(dp[w] + b[v] + b[w], ep[w]); e += max(dp[w], ep[w]); } dp[v] = d; ep[v] = e; } fn solve() { let out = std::io::stdout(); let mut out = BufWriter::new(out.lock()); macro_rules! puts { ($($format:tt)*) => (let _ = write!(out,$($format)*);); } #[allow(unused)] macro_rules! putvec { ($v:expr) => { for i in 0..$v.len() { puts!("{}{}", $v[i], if i + 1 == $v.len() {"\n"} else {" "}); } } } input! { n: usize, a: [i64; n], b: [i64; n], uv: [(usize1, usize1); n - 1], } let mut g = vec![vec![]; n]; for &(u, v) in &uv { g[u].push(v); g[v].push(u); } let mut dp = vec![-INF; n]; let mut ep = vec![-INF; n]; dfs(0, n, &g, &a, &b, &mut dp, &mut ep); puts!("{}\n", max(dp[0], ep[0])); } fn main() { // In order to avoid potential stack overflow, spawn a new thread. let stack_size = 104_857_600; // 100 MB let thd = std::thread::Builder::new().stack_size(stack_size); thd.spawn(|| solve()).unwrap().join().unwrap(); }