結果
問題 | No.2681 ゲームセンターの両替 |
ユーザー | naut3 |
提出日時 | 2024-03-20 21:18:29 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 1 ms / 2,000 ms |
コード長 | 1,998 bytes |
コンパイル時間 | 15,722 ms |
コンパイル使用メモリ | 393,108 KB |
実行使用メモリ | 6,820 KB |
最終ジャッジ日時 | 2024-10-05 04:04:51 |
合計ジャッジ時間 | 15,838 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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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 | 0 ms
6,816 KB |
testcase_01 | AC | 0 ms
6,816 KB |
testcase_02 | AC | 1 ms
6,820 KB |
testcase_03 | AC | 1 ms
6,816 KB |
testcase_04 | AC | 1 ms
6,820 KB |
testcase_05 | AC | 1 ms
6,820 KB |
testcase_06 | AC | 0 ms
6,816 KB |
testcase_07 | AC | 1 ms
6,816 KB |
testcase_08 | AC | 1 ms
6,816 KB |
testcase_09 | AC | 1 ms
6,816 KB |
testcase_10 | AC | 0 ms
6,820 KB |
testcase_11 | AC | 0 ms
6,816 KB |
testcase_12 | AC | 1 ms
6,816 KB |
testcase_13 | AC | 0 ms
6,816 KB |
testcase_14 | AC | 1 ms
6,816 KB |
testcase_15 | AC | 0 ms
6,816 KB |
testcase_16 | AC | 0 ms
6,816 KB |
testcase_17 | AC | 1 ms
6,816 KB |
testcase_18 | AC | 1 ms
6,816 KB |
testcase_19 | AC | 1 ms
6,816 KB |
testcase_20 | AC | 1 ms
6,816 KB |
testcase_21 | AC | 1 ms
6,820 KB |
testcase_22 | AC | 0 ms
6,816 KB |
testcase_23 | AC | 1 ms
6,820 KB |
testcase_24 | AC | 1 ms
6,820 KB |
testcase_25 | AC | 0 ms
6,816 KB |
コンパイルメッセージ
warning: value assigned to `Y` is never read --> src/main.rs:39:5 | 39 | Y -= 100 * c100; | ^ | = help: maybe it is overwritten before being read? = note: `#[warn(unused_assignments)]` on by default warning: variable does not need to be mutable --> src/main.rs:28:9 | 28 | let mut c10000 = Y / 10000; | ----^^^^^^ | | | help: remove this `mut` | = note: `#[warn(unused_mut)]` on by default warning: variable does not need to be mutable --> src/main.rs:30:9 | 30 | let mut c5000 = Y / 5000; | ----^^^^^ | | | help: remove this `mut` warning: variable does not need to be mutable --> src/main.rs:32:9 | 32 | let mut c2000 = Y / 2000; | ----^^^^^ | | | help: remove this `mut` warning: variable does not need to be mutable --> src/main.rs:34:9 | 34 | let mut c1000 = Y / 1000; | ----^^^^^ | | | help: remove this `mut` warning: variable does not need to be mutable --> src/main.rs:36:9 | 36 | let mut c500 = Y / 500; | ----^^^^ | | | help: remove this `mut` warning: variable does not need to be mutable --> src/main.rs:38:9 | 38 | let mut c100 = Y / 100; | ----^^^^ | | | help: remove this `mut`
ソースコード
#![allow(non_snake_case, unused_imports, unused_must_use)] 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>() }; ($T: ty, $N: expr) => { (0..$N).map(|_| scan.token::<$T>()).collect::<Vec<_>>() }; } let C = input!(usize); let mut Y = input!(usize); if 100 * C > Y { writeln!(out, "can't exchange"); return; } // 持っている通貨を特定する let mut c10000 = Y / 10000; Y -= 10000 * c10000; let mut c5000 = Y / 5000; Y -= 5000 * c5000; let mut c2000 = Y / 2000; Y -= 2000 * c2000; let mut c1000 = Y / 1000; Y -= 1000 * c1000; let mut c500 = Y / 500; Y -= 500 * c500; let mut c100 = Y / 100; Y -= 100 * c100; if c100 >= C { writeln!(out, "no exchange"); return; } let d = C - c100; let a = ((d + 4) / 5) * 5 + c100; writeln!(out, "{}", a); } 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()) } } } }