結果
問題 | No.2921 Seated in Classroom |
ユーザー | ぱるま |
提出日時 | 2024-10-12 15:02:45 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 259 ms / 2,000 ms |
コード長 | 5,462 bytes |
コンパイル時間 | 12,839 ms |
コンパイル使用メモリ | 379,072 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-10-12 15:03:03 |
合計ジャッジ時間 | 15,223 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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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 |
---|---|---|
testcase_00 | AC | 220 ms
5,248 KB |
testcase_01 | AC | 134 ms
5,248 KB |
testcase_02 | AC | 97 ms
5,248 KB |
testcase_03 | AC | 242 ms
5,376 KB |
testcase_04 | AC | 259 ms
5,248 KB |
testcase_05 | AC | 1 ms
5,248 KB |
testcase_06 | AC | 1 ms
5,248 KB |
ソースコード
//#[derive_readable] #[derive(Debug, Clone)] struct Problem { n: usize, m: usize, } impl Problem { fn read() -> Problem { input! { n: usize, m: usize, } Problem { n, m } } fn solve(&self) -> Answer { let n_need = self.n; // 充電が必要 let n_non_need = self.m; // 充電が不要 // まずは充電が必要な人を座らせる let n_row_need = if n_need % 4 == 0 { n_need / 4 } else { n_need / 4 + 1 }; let n_charge_remain = if n_need % 4 == 0 { 0 } else { 4 - n_need % 4 }; // n_charge_remainの数だけ充電が不要な人も座らせる if n_non_need <= n_charge_remain { return Answer { ans: n_row_need }; } let n_non_need2 = n_non_need - n_charge_remain; if n_non_need2 <= 4 * n_row_need { return Answer { ans: n_row_need }; } let n_non_need3 = n_non_need2 - 4 * n_row_need; let n_row_non_need = if n_non_need3 % 8 == 0 { n_non_need3 / 8 } else { n_non_need3 / 8 + 1 }; Answer { ans: n_row_need + n_row_non_need, } } #[allow(dead_code)] fn solve_naive(&self) -> Answer { todo!(); // let ans = 0; // Answer { ans } } } #[derive(Clone, Debug, PartialEq, Eq)] struct Answer { ans: usize, } impl Answer { fn print(&self) { println!("{}", self.ans); } } fn main() { input! { t: usize } for _ in 0..t { Problem::read().solve().print(); } } #[cfg(test)] mod tests { #[allow(unused_imports)] use super::*; #[allow(unused_imports)] use rand::{rngs::SmallRng, seq::SliceRandom, *}; #[test] fn test_problem() { assert_eq!(1 + 1, 2); } #[allow(dead_code)] #[derive(Debug)] struct WrongTestCase { problem: Problem, main_ans: Answer, naive_ans: Answer, } #[allow(dead_code)] fn check(p: &Problem) -> Option<WrongTestCase> { let main_ans = p.solve(); let naive_ans = p.solve_naive(); if main_ans != naive_ans { Some(WrongTestCase { problem: p.clone(), main_ans, naive_ans, }) } else { None } } #[allow(dead_code)] fn make_random_problem(rng: &mut SmallRng) -> Problem { todo!() // let n = rng.gen_range(1..=10); // let p = Problem { _a: n }; // println!("{:?}", &p); // p } #[allow(unreachable_code)] #[test] fn test_with_naive() { let num_tests = 0; let max_wrong_case = 10; // この件数間違いが見つかったら打ち切り let mut rng = SmallRng::seed_from_u64(42); // let mut rng = SmallRng::from_entropy(); let mut wrong_cases: Vec<WrongTestCase> = vec![]; for _ in 0..num_tests { let p = make_random_problem(&mut rng); let result = check(&p); if let Some(wrong_test_case) = result { wrong_cases.push(wrong_test_case); } if wrong_cases.len() >= max_wrong_case { break; } } if !wrong_cases.is_empty() { for t in &wrong_cases { println!("{:?}", t.problem); println!("main ans : {:?}", t.main_ans); println!("naive ans: {:?}", t.naive_ans); println!(); } println!("{} cases are wrong.", wrong_cases.len()); panic!(); } } } // ====== import ====== #[allow(unused_imports)] use proconio::{ derive_readable, fastout, input, marker::{Bytes, Chars, Usize1}, }; #[allow(unused_imports)] use std::cmp::Reverse; #[allow(unused_imports)] use std::collections::{BinaryHeap, HashMap, HashSet}; // ====== output func ====== #[allow(unused_imports)] use print_vec::*; pub mod print_vec { use proconio::fastout; #[fastout] pub fn print_vec<T: std::fmt::Debug>(arr: &[T]) { for a in arr { println!("{:?}", a); } } #[fastout] pub fn print_vec_1line<T: std::fmt::Debug>(arr: &[T]) { let msg = arr .iter() .map(|x| format!("{:?}", x)) .collect::<Vec<String>>() .join(" "); println!("{}", msg); } #[fastout] pub fn print_vec2<T: std::fmt::Debug>(arr: &Vec<Vec<T>>) { for row in arr { let msg = row .iter() .map(|x| format!("{:?}", x)) .collect::<Vec<String>>() .join(" "); println!("{}", msg); } } pub fn print_bytes(bytes: &[u8]) { let msg = String::from_utf8(bytes.to_vec()).unwrap(); println!("{}", msg); } pub fn print_chars(chars: &[char]) { let msg = chars.iter().collect::<String>(); println!("{}", msg); } #[fastout] pub fn print_vec_bytes(vec_bytes: &[Vec<u8>]) { for row in vec_bytes { let msg = String::from_utf8(row.to_vec()).unwrap(); println!("{}", msg); } } } #[allow(unused)] fn print_yesno(ans: bool) { let msg = if ans { "Yes" } else { "No" }; println!("{}", msg); } // ====== snippet ======