結果

問題 No.531 エヌスクミ島の平和協定
ユーザー MasuqaT
提出日時 2020-08-10 21:29:56
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 2 ms / 2,000 ms
コード長 6,050 bytes
コンパイル時間 17,466 ms
コンパイル使用メモリ 395,724 KB
実行使用メモリ 5,248 KB
最終ジャッジ日時 2024-10-08 15:53:08
合計ジャッジ時間 18,753 ms
ジャッジサーバーID
(参考情報)
judge3 / judge2
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 2
other AC * 37
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

// Macro by MasuqaT (occar421)
// https://github.com/occar421/ProgrammingContest/tree/master/templates/src/standard_io.rs
use std::io;
use std::io::{BufRead, Write, Result};
use std::ops::{Rem, Div, Mul};
use std::fmt::Display;
// From https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
(source = $s:expr, $($r:tt)*) => {
let mut iter = $s.split_whitespace();
input_inner!{iter, $($r)*}
};
(stdin = $s:expr, $($r:tt)*) => {
let s = {
let mut s = String::new();
$s.read_to_string(&mut s).unwrap();
s
};
let mut iter = s.split_whitespace();
input_inner!{iter, $($r)*}
};
}
macro_rules! input_inner {
($iter:expr) => {};
($iter:expr, ) => {};
($iter:expr, $var:ident : $t:tt $($r:tt)*) => {
let $var = read_value!($iter, $t);
input_inner!{$iter $($r)*}
};
}
macro_rules! read_value {
($iter:expr, ( $($t:tt),* )) => {
( $(read_value!($iter, $t)),* )
};
($iter:expr, [ $t:tt ; $len:expr ]) => {
(0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>()
};
($iter:expr, chars) => {
read_value!($iter, String).chars().collect::<Vec<char>>()
};
($iter:expr, usize1) => {
read_value!($iter, usize) - 1
};
($iter:expr, $t:ty) => {
$iter.next().unwrap_or_default().parse::<$t>().expect("Parse error")
};
}
#[allow(unused_macros)]
macro_rules! assert_judge {
($method:ident, $input:expr, $expected:expr) => {
{
let input = $input.as_bytes();
let mut output = Vec::new();
$method(&input[..], &mut output).expect("Should not emit error");
let output = String::from_utf8(output).expect("Not UTF-8");
assert_eq!(output, $expected);
}
};
}
#[allow(unused_macros)]
macro_rules! assert_judge_with_output {
($method:ident, $input:expr) => {
{
let input = $input.as_bytes();
let mut output = Vec::new();
$method(&input[..], &mut output).expect("Should not emit error");
String::from_utf8(output).expect("Not UTF-8")
}
};
}
#[allow(unused_macros)]
macro_rules! assert_eq_with_error {
($left:expr, $right:expr, $precision:expr) => ({
match (&$left, &$right, &$precision) {
(left_val, right_val, precision_val) => {
if !(*left_val - *precision_val < *right_val && *right_val < *left_val + *precision_val) {
// The reborrows below are intentional. Without them, the stack slot for the
// borrow is initialized even before the values are compared, leading to a
// noticeable slow down.
panic!(r#"assertion failed: `(left == right) +- precision`
left: `{:?}`,
right: `{:?}`,
precision: `{:?}`"#, &*left_val, &*right_val, &*precision_val)
}
}
}
});
}
#[allow(unused_macros)]
macro_rules! assert_judge_with_error {
($method:ident, $input:expr, $expected:expr, $t:ty | $precision:expr ) => {
{
let input = $input.as_bytes();
let mut output = Vec::new();
$method(&input[..], &mut output).expect("Should not emit error");
let output = String::from_utf8(output).expect("Not UTF-8");
let actual: $t = output.parse().unwrap();
let expected: $t = $expected.parse().unwrap();
assert_eq_with_error!(actual, expected, $precision);
}
};
}
pub trait GenericInteger: Copy + PartialEq + Rem<Output=Self> + Div<Output=Self> + Mul<Output=Self> {
fn zero() -> Self;
}
macro_rules! dec_gi {
() => {};
($t:ty $(, $r:ty)*) => {
impl GenericInteger for $t {
#[inline]
fn zero() -> Self { 0 }
}
dec_gi![ $( $r ),* ];
};
}
dec_gi![u8, u16, u32, u64, u128, usize, i8, i16, i32, i64, i128, isize];
#[allow(dead_code)]
pub fn gcd<T>(a: T, b: T) -> T where T: GenericInteger {
if b == T::zero() {
a
} else {
gcd(b, a % b)
}
}
#[allow(dead_code)]
#[inline]
pub fn lcm<T>(a: T, b: T) -> T where T: GenericInteger {
a / gcd(a, b) * b
}
pub trait IterExt<T> where T: Display {
fn easy_join(&mut self, separator: &str) -> String;
}
impl<TItem, TTrait> IterExt<TItem> for TTrait where TItem: Display, TTrait: Iterator<Item=TItem> {
#[inline]
fn easy_join(&mut self, separator: &str) -> String {
self.map(|i| format!("{}", i)).collect::<Vec<_>>().join(separator)
}
}
#[allow(unused_macros)]
macro_rules! swap {
($v1:expr, $v2:expr) => {
let buf = $v1;
$v1 = $v2;
$v2 = buf;
};
}
#[macro_export]
macro_rules! invert_index {
($v:expr) => ({
let mut goal = vec![0usize; $v.len()];
for (i, v) in $v.iter().enumerate() {
goal[*v] = i;
}
goal
})
}
fn main() {
let stdio = io::stdin();
let input = stdio.lock();
let output = io::stdout();
process(input, output).expect("Should not emit error");
}
fn process<R, W>(mut reader: R, mut writer: W) -> Result<()> where
R: BufRead,
W: Write {
input! {
stdin = reader,
n: usize, m: usize,
}
// n/2
let days = match (n <= m, n % 2) {
(true, _) => 1,
(_, 0) if (n as f32 / m as f32).ceil() as u8 <= 2 => 2,
_ => -1
};
write!(writer, "{}", days)?;
Ok(())
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn sample1() {
assert_judge!(process, "3 2", "-1");
}
#[test]
fn sample2() {
assert_judge!(process, "3 3", "1");
}
#[test]
fn small1() {
assert_judge!(process, "3 5", "1");
}
#[test]
fn small5() {
assert_judge!(process, "100 50", "2");
}
#[test]
fn small6() {
assert_judge!(process, "8 3", "-1");
}
}
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