結果
| 問題 |
No.994 ばらばらコイン
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-02-22 00:26:06 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 14 ms / 2,000 ms |
| コード長 | 2,574 bytes |
| コンパイル時間 | 12,611 ms |
| コンパイル使用メモリ | 380,592 KB |
| 実行使用メモリ | 5,248 KB |
| 最終ジャッジ日時 | 2024-10-09 05:06:19 |
| 合計ジャッジ時間 | 13,925 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 23 |
コンパイルメッセージ
warning: unused variable: `ab`
--> src/main.rs:85:9
|
85 | ab: [(usize1, usize1); n - 1],
| ^^
|
help: `ab` is captured in macro and introduced a unused variable
--> src/main.rs:28:13
|
28 | let $var = read_value!($next, $t);
| ^^^^
...
83 | / input! {
84 | | n: usize, k: usize,
85 | | ab: [(usize1, usize1); n - 1],
86 | | }
| |_____- in this macro invocation
= note: `#[warn(unused_variables)]` on by default
= note: this warning originates in the macro `input_inner` which comes from the expansion of the macro `input` (in Nightly builds, run with -Z macro-backtrace for more info)
warning: function `dfs` is never used
--> src/main.rs:69:4
|
69 | fn dfs(v: usize, par: usize, g: &[Vec<usize>], d: i64, dist: &mut [i64]) {
| ^^^
|
= note: `#[warn(dead_code)]` on by default
ソースコード
#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
use std::io::{Write, BufWriter};
// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
($($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, ( $($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);
(0..len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
}};
($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());
}
fn dfs(v: usize, par: usize, g: &[Vec<usize>], d: i64, dist: &mut [i64]) {
dist[v] = d;
for &w in &g[v] {
if w == par { continue; }
dfs(w, v, g, d + 1, dist);
}
}
fn solve() {
let out = std::io::stdout();
let mut out = BufWriter::new(out.lock());
macro_rules! puts {
($($format:tt)*) => (let _ = write!(out,$($format)*););
}
input! {
n: usize, k: usize,
ab: [(usize1, usize1); n - 1],
}
if k > n {
puts!("-1\n");
return;
}
puts!("{}\n", k - 1);
}
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();
}