結果
問題 |
No.2317 Expression Menu
|
ユーザー |
![]() |
提出日時 | 2023-06-18 19:46:33 |
言語 | Rust (1.83.0 + proconio) |
結果 |
AC
|
実行時間 | 317 ms / 2,000 ms |
コード長 | 2,090 bytes |
コンパイル時間 | 14,269 ms |
コンパイル使用メモリ | 377,564 KB |
実行使用メモリ | 217,856 KB |
最終ジャッジ日時 | 2024-06-26 08:53:24 |
合計ジャッジ時間 | 25,861 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 | AC * 37 |
コンパイルメッセージ
warning: unused `Result` that must be used --> src/main.rs:49:5 | 49 | writeln!(out, "{}", ans); | ^^^^^^^^^^^^^^^^^^^^^^^^ | = note: this `Result` may be an `Err` variant, which should be handled = note: `#[warn(unused_must_use)]` on by default = note: this warning originates in the macro `writeln` (in Nightly builds, run with -Z macro-backtrace for more info)
ソースコード
#![allow(non_snake_case, unused_imports)] use std::io::{self, prelude::*}; use std::str; fn main() { let (stdin, stdout) = (io::stdin(), io::stdout()); let mut scan = Scanner::new(stdin.lock()); let mut out = io::BufWriter::new(stdout.lock()); macro_rules! input { ($T: ty) => { scan.token::<$T>() }; } let N = input!(usize); let X = input!(usize); let Y = input!(usize); let ABC = (0..N) .map(|_| (input!(usize), input!(usize), input!(isize))) .collect::<Vec<_>>(); let mut dp = vec![vec![vec![-(1 << 60); Y + 1]; X + 1]; N + 1]; dp[0][0][0] = 0; for i in 0..N { let (A, B, C) = ABC[i]; for a in 0..=X { for b in 0..=Y { dp[i + 1][a][b] = std::cmp::max(dp[i + 1][a][b], dp[i][a][b]); if dp[i][a][b] >= 0 && a + A <= X && b + B <= Y { dp[i + 1][a + A][b + B] = std::cmp::max(dp[i][a][b] + C, dp[i + 1][a + A][b + B]); } } } } let mut ans = -(1 << 60); for a in 0..=X { for b in 0..=Y { ans = std::cmp::max(ans, dp[N][a][b]); } } writeln!(out, "{}", ans); } struct Scanner<R> { reader: R, buf_str: Vec<u8>, buf_iter: str::SplitWhitespace<'static>, } impl<R: BufRead> Scanner<R> { fn new(reader: R) -> Self { Self { reader, buf_str: vec![], buf_iter: "".split_whitespace(), } } fn token<T: str::FromStr>(&mut self) -> T { loop { if let Some(token) = self.buf_iter.next() { return token.parse().ok().expect("Failed parse"); } self.buf_str.clear(); self.reader .read_until(b'\n', &mut self.buf_str) .expect("Failed read"); self.buf_iter = unsafe { let slice = str::from_utf8_unchecked(&self.buf_str); std::mem::transmute(slice.split_whitespace()) } } } }