結果
問題 | No.2486 Don't come next to me |
ユーザー |
|
提出日時 | 2023-09-29 23:39:53 |
言語 | Rust (1.83.0 + proconio) |
結果 |
AC
|
実行時間 | 177 ms / 2,000 ms |
コード長 | 2,181 bytes |
コンパイル時間 | 12,732 ms |
コンパイル使用メモリ | 376,896 KB |
実行使用メモリ | 16,708 KB |
最終ジャッジ日時 | 2024-07-22 17:35:02 |
合計ジャッジ時間 | 16,113 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 20 |
ソースコード
pub mod scanner {pub struct Scanner {buf: Vec<String>,}impl Scanner {pub fn new() -> Self {Self { buf: vec![] }}pub fn new_from(source: &str) -> Self {let source = String::from(source);let buf = Self::split(source);Self { buf }}pub fn next<T: std::str::FromStr>(&mut self) -> T {loop {if let Some(x) = self.buf.pop() {return x.parse().ok().expect("");}let mut source = String::new();std::io::stdin().read_line(&mut source).expect("");self.buf = Self::split(source);}}fn split(source: String) -> Vec<String> {source.split_whitespace().rev().map(String::from).collect::<Vec<_>>()}}}use crate::scanner::Scanner;use std::{collections::BTreeMap, io::Write};fn main() {let mut scanner = Scanner::new();let out = std::io::stdout();let mut out = std::io::BufWriter::new(out.lock());let t: usize = 1;for _ in 0..t {solve(&mut scanner, &mut out);}}fn solve(scanner: &mut Scanner, out: &mut std::io::BufWriter<std::io::StdoutLock>) {let _n = scanner.next::<usize>();let m = scanner.next::<usize>();let a = (0..m).map(|_| scanner.next::<usize>()).collect::<Vec<_>>();fn dfs(memo: &mut BTreeMap<usize, usize>, x: usize) -> usize {if let Some(&res) = memo.get(&x) {return res;}if x <= 1 || x % 2 == 0 {return x;}let mut res = 0;for x1 in [(x - 1) / 2, x / 2] {let res1 = dfs(memo, x1);memo.insert(x1, res1);res += res1;}memo.insert(x, res);return res;}let mut ans = 0usize;let mut memo = BTreeMap::new();memo.insert(0, 0);memo.insert(1, 1);memo.insert(2, 2);for i in 0..m - 1 {ans += dfs(&mut memo, a[i + 1] - a[i] - 1);}writeln!(out, "{}", ans).unwrap();}