結果
問題 | No.2438 Double Least Square |
ユーザー | koba-e964 |
提出日時 | 2023-08-22 09:46:19 |
言語 | Rust (1.77.0 + proconio) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,744 bytes |
コンパイル時間 | 11,601 ms |
コンパイル使用メモリ | 377,836 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-05-09 15:23:28 |
合計ジャッジ時間 | 13,262 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
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testcase_00 | WA | - |
testcase_01 | WA | - |
testcase_02 | WA | - |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | AC | 1 ms
5,376 KB |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
コンパイルメッセージ
warning: unused variable: `g` --> src/main.rs:79:13 | 79 | let g = (g1 * g1 + g2 * g2).sqrt(); | ^ help: if this is intentional, prefix it with an underscore: `_g` | = note: `#[warn(unused_variables)]` on by default warning: variable does not need to be mutable --> src/main.rs:64:9 | 64 | let mut coef = 0.001; | ----^^^^ | | | help: remove this `mut` | = note: `#[warn(unused_mut)]` on by default
ソースコード
#[allow(unused_imports)] use std::cmp::*; // https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 macro_rules! input { ($($r:tt)*) => { let stdin = std::io::stdin(); let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock())); let mut next = move || -> String{ bytes.by_ref().map(|r|r.unwrap() as char) .skip_while(|c|c.is_whitespace()) .take_while(|c|!c.is_whitespace()) .collect() }; input_inner!{next, $($r)*} }; } macro_rules! input_inner { ($next:expr) => {}; ($next:expr,) => {}; ($next:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($next, $t); input_inner!{$next $($r)*} }; } macro_rules! read_value { ($next:expr, ( $($t:tt),* )) => { ($(read_value!($next, $t)),*) }; ($next:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>() }; ($next:expr, chars) => { read_value!($next, String).chars().collect::<Vec<char>>() }; ($next:expr, usize1) => (read_value!($next, usize) - 1); ($next:expr, [ $t:tt ]) => {{ let len = read_value!($next, usize); read_value!($next, [$t; len]) }}; ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error")); } trait Change { fn chmax(&mut self, x: Self); fn chmin(&mut self, x: Self); } impl<T: PartialOrd> Change for T { fn chmax(&mut self, x: T) { if *self < x { *self = x; } } fn chmin(&mut self, x: T) { if *self > x { *self = x; } } } fn main() { // In order to avoid potential stack overflow, spawn a new thread. let stack_size = 104_857_600; // 100 MB let thd = std::thread::Builder::new().stack_size(stack_size); thd.spawn(|| solve()).unwrap().join().unwrap(); } fn solve() { input! { n: usize, h: f64, xy: [(f64, f64); n], } let mut a1 = 0.0; let mut a2 = 0.0; let mut coef = 0.001; for _ in 0..100 { let mut g1 = 0.0; let mut g2 = 0.0; for &(x, y) in &xy { if (x * a2 - y).abs() < (x * a1 + h - y).abs() { g2 += x * (x * a2 - y); } else { g1 += x * (x * a1 + h - y); } } if g1 == 0.0 && g2 == 0.0 { break; } eprintln!("g = {} {}", g1, g2); let g = (g1 * g1 + g2 * g2).sqrt(); a1 -= g1 * coef; a2 -= g2 * coef; // eprintln!("new a = {} {}", a1, a2); } eprintln!("{} {}", a1, a2); let mut ans = 0.0; for &(x, y) in &xy { let tmp = (x * a2 - y).abs().min((x * a1 + h - y).abs()); ans += tmp * tmp; } println!("{}", ans); }