結果
| 問題 |
No.1583 Building Blocks
|
| コンテスト | |
| ユーザー |
ikd
|
| 提出日時 | 2021-07-03 11:00:29 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 10 ms / 2,000 ms |
| コード長 | 2,288 bytes |
| コンパイル時間 | 19,719 ms |
| コンパイル使用メモリ | 390,324 KB |
| 実行使用メモリ | 9,728 KB |
| 最終ジャッジ日時 | 2024-09-14 02:51:23 |
| 合計ジャッジ時間 | 14,923 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge6 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 43 |
ソースコード
//! # Bundled libraries
//!
//! - `procon_reader 0.1.0 (git+https://github.com/ia7ck/rust-competitive-programming#59eb5cd766b43a170294fe6e7a7026645fc306e3)` licensed under **missing** as `crate::procon_reader`
use procon_reader::ProconReader;
fn main() {
let stdin = std::io::stdin();
let mut rd = ProconReader::new(stdin.lock());
let n: usize = rd.get();
let ws: Vec<(u64, u64)> = (0..n)
.map(|_| {
let w: u64 = rd.get();
let s: u64 = rd.get();
(w, s)
})
.collect();
let mut ws = ws;
ws.sort_by_key(|(w, s)| w + s);
let inf = std::u64::MAX / 2;
let mut dp = vec![vec![inf; n + 1]; n + 1];
dp[0][0] = 0;
for (i, &(w, s)) in ws.iter().enumerate() {
for j in 0..=n {
dp[i + 1][j] = dp[i + 1][j].min(dp[i][j]);
if j >= 1 && s >= dp[i][j - 1] {
dp[i + 1][j] = dp[i + 1][j].min(dp[i][j - 1] + w);
}
}
}
let ans = dp[n].iter().rposition(|&x| x != inf).unwrap();
println!("{}", ans);
}
// The following code was expanded by `cargo-equip`.
#[cfg_attr(any(),rustfmt::skip)]#[allow(unused)]pub mod procon_reader{pub struct ProconReader<R>{r:R,l:String,i:usize,}impl<R:std::io::BufRead>ProconReader<R>{pub fn new(reader:R)->Self{Self{r:reader,l:String::new(),i:0,}}pub fn get<T>(&mut self)->T where T:std::str::FromStr,<T as std::str::FromStr>::Err:std::fmt::Debug,{self.skip_blanks();assert!(self.i<self.l.len());assert_ne!(&self.l[self.i..=self.i]," ");let rest=&self.l[self.i..];let len=rest.find(' ').unwrap_or_else(| |rest.len());let val=rest[..len].parse().unwrap_or_else(|e|panic!("{:?}, attempt to read `{}`",e,rest));self.i+=len;val}fn skip_blanks(&mut self){loop{match self.l[self.i..].find(|ch|ch!=' '){Some(j)=>{self.i+=j;break;}None=>{let mut buf=String::new();let num_bytes=self.r.read_line(&mut buf).unwrap_or_else(|_|panic!("invalid UTF-8"));assert!(num_bytes>0,"reached EOF :(");self.l=buf.trim_end_matches('\n').trim_end_matches('\r').to_string();self.i=0;}}}}pub fn get_vec<T>(&mut self,n:usize)->Vec<T>where T:std::str::FromStr,<T as std::str::FromStr>::Err:std::fmt::Debug,{(0..n).map(|_|self.get()).collect()}pub fn get_chars(&mut self)->Vec<char>{self.get::<String>().chars().collect()}}}
ikd