結果
| 問題 | No.162 8020運動 |
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2026-02-05 12:20:14 |
| 言語 | Rust (1.93.0 + proconio + num + itertools) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 3,393 bytes |
| 記録 | |
| コンパイル時間 | 2,069 ms |
| コンパイル使用メモリ | 210,136 KB |
| 実行使用メモリ | 7,844 KB |
| 最終ジャッジ日時 | 2026-02-05 12:20:33 |
| 合計ジャッジ時間 | 18,606 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | TLE * 1 -- * 25 |
ソースコード
use fio::*;
const N: usize = 14;
fn main() {
let a = read::<i32>();
let [p0, p1, p2] = read_tuple::<i32, 3>();
let (p0, p1, p2) = (p0 as f64 / 100.0, p1 as f64 / 100.0, p2 as f64 / 100.0);
let mut dp = vec![0.0; 1 << N];
dp[(1 << N) - 1] = 1.0;
for _ in 0..80 - a {
let mut ndp = vec![0.0; 1 << N];
for i in 0..1 << N {
let mut pp = vec![0f64; N];
for k in 0..N {
let val = ((i << 1) >> k) & 5;
pp[k] = match val {
0 => p0,
1 | 4 => p1,
5 => p2,
_ => unreachable!(),
}
}
let mut j = i;
loop {
let mut prob = 1.0;
for k in 0..N {
if i & (1 << k) == 0 {
continue;
}
prob *= if j & (1 << k) == 0 {
pp[k]
} else {
1.0 - pp[k]
}
}
ndp[j] += prob * dp[i];
if j == 0 {
break;
} else {
j = (j - 1) & i;
}
}
}
dp = ndp;
}
eprintln!("{:?}", &dp);
let ans = 2.0
* dp.into_iter()
.enumerate()
.map(|(i, x)| i.count_ones() as f64 * x)
.sum::<f64>();
println!("{ans:.9}");
}
mod fio {
use std::{
cell::RefCell,
convert::TryInto,
fmt::Debug,
io::{BufRead, BufWriter, StdinLock, StdoutLock, stdin, stdout},
str::FromStr,
};
thread_local! {
pub static STDIN: RefCell<StdinLock<'static>> = RefCell::new(stdin().lock());
pub static STDOUT: RefCell<BufWriter<StdoutLock<'static>>> = RefCell::new(BufWriter::new(stdout().lock()));
}
#[allow(dead_code)]
pub fn read<T: FromStr>() -> T
where
<T as FromStr>::Err: Debug,
{
read_line().parse().unwrap()
}
#[allow(dead_code)]
pub fn read_vec<T: FromStr>() -> Vec<T>
where
<T as FromStr>::Err: Debug,
{
read_line()
.split_whitespace()
.map(|x| x.parse().unwrap())
.collect()
}
#[allow(dead_code)]
pub fn read_tuple<T, const N: usize>() -> [T; N]
where
T: FromStr + Debug,
<T as FromStr>::Err: Debug,
{
read_vec::<T>().try_into().unwrap()
}
/// whitespace at the end of the line is ignored
pub fn read_line() -> String {
let mut s = String::new();
STDIN.with(|cell| {
cell.borrow_mut().read_line(&mut s).unwrap();
});
String::from_str(s.trim_end()).unwrap()
}
}
#[macro_export]
macro_rules! print {
($($t:tt)*) => {
fio::STDOUT.with(|cell|{
use std::io::Write;
write!(cell.borrow_mut(), $($t)*).unwrap()
})};
}
#[macro_export]
macro_rules! println {
($($t:tt)*) => {
fio::STDOUT.with(|cell| {
use std::io::Write;
writeln!(cell.borrow_mut(), $($t)*).unwrap()
})
};
}
#[macro_export]
macro_rules! flush {
() => {
fio::STDOUT.with(|cell| {
use std::io::Write;
cell.borrow_mut().flush().unwrap()
});
};
}