結果
問題 | No.2567 A_1 > A_2 > ... > A_N |
ユーザー |
![]() |
提出日時 | 2023-12-02 16:53:31 |
言語 | Rust (1.83.0 + proconio) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,145 bytes |
コンパイル時間 | 15,999 ms |
コンパイル使用メモリ | 380,412 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-09-26 20:50:48 |
合計ジャッジ時間 | 15,760 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 1 |
other | AC * 12 WA * 4 |
ソースコード
use scanner::Scanner;use std::io;fn main() {let mut scanner = Scanner::from(io::stdin().lock());let t = scan!(usize, <~ scanner);for _ in 0..t {let (n, x) = scan!((usize, usize), <~ scanner);if n * (n + 1) / 2 > x {println!("-1");continue;}let mut acc = 0;let mut ans = Vec::new();for i in 0..n {let mut y = ans.last().copied().unwrap_or(x);let mut ng = 0;while y - ng > 1 {let z = (y + ng) / 2;if z > n - i - 1 {// (z - 1) + (z - 2) + ... + (z - (n - i - 1))let rest = ((z - 1) + (z - (n - i - 1))) * (n - i - 1) / 2;if x.saturating_sub(acc + z) <= rest {y = z;} else {ng = z;}} else {ng = z;}}ans.push(y);acc += y;}for i in 1..n {assert!(ans[i - 1] > ans[i]);}for i in 0..n {print!("{}", ans[i]);if i + 1 < n {print!(" ");} else {print!("\n");}}}}// ✂ --- scanner --- ✂#[allow(unused)]mod scanner {use std::fmt;use std::io;use std::str;pub struct Scanner<R> {r: R,l: String,i: usize,}impl<R> Scanner<R>whereR: io::BufRead,{pub fn new(reader: R) -> Self {Self {r: reader,l: String::new(),i: 0,}}pub fn scan<T>(&mut self) -> TwhereT: str::FromStr,T::Err: fmt::Debug,{self.skip_blanks();assert!(self.i < self.l.len()); // remain some characterassert_ne!(&self.l[self.i..=self.i], " ");let rest = &self.l[self.i..];let len = rest.find(|ch| char::is_ascii_whitespace(&ch)).unwrap_or_else(|| rest.len());// parse self.l[self.i..(self.i + len)]let val = rest[..len].parse().unwrap_or_else(|e| panic!("{:?}, attempt to read `{}`", e, rest));self.i += len;val}pub fn scan_vec<T>(&mut self, n: usize) -> Vec<T>whereT: str::FromStr,T::Err: fmt::Debug,{(0..n).map(|_| self.scan()).collect::<Vec<_>>()}fn skip_blanks(&mut self) {loop {match self.l[self.i..].find(|ch| !char::is_ascii_whitespace(&ch)) {Some(j) => {self.i += j;break;}None => {self.l.clear(); // clear bufferlet num_bytes = self.r.read_line(&mut self.l).unwrap_or_else(|_| panic!("invalid UTF-8"));assert!(num_bytes > 0, "reached EOF :(");self.i = 0;}}}}}impl<'a> From<&'a str> for Scanner<&'a [u8]> {fn from(s: &'a str) -> Self {Self::new(s.as_bytes())}}impl<'a> From<io::StdinLock<'a>> for Scanner<io::BufReader<io::StdinLock<'a>>> {fn from(stdin: io::StdinLock<'a>) -> Self {Self::new(io::BufReader::new(stdin))}}#[macro_export]macro_rules! scan {(( $($t: ty),+ ), <~ $scanner: expr) => {( $(scan!($t, <~ $scanner)),+ )};([ $t: tt; $n: expr ], <~ $scanner: expr) => {(0..$n).map(|_| scan!($t, <~ $scanner)).collect::<Vec<_>>()};($t: ty, <~ $scanner: expr) => {$scanner.scan::<$t>()};}}// ✂ --- scanner --- ✂