結果

問題 No.1340 おーじ君をさがせ
ユーザー nebocconebocco
提出日時 2021-02-17 20:14:33
言語 Rust
(1.77.0 + proconio)
結果
AC  
実行時間 265 ms / 2,000 ms
コード長 5,213 bytes
コンパイル時間 12,597 ms
コンパイル使用メモリ 376,504 KB
実行使用メモリ 6,944 KB
最終ジャッジ日時 2024-09-14 05:45:42
合計ジャッジ時間 18,104 ms
ジャッジサーバーID
(参考情報)
judge4 / judge3
このコードへのチャレンジ
(要ログイン)

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 1 ms
6,816 KB
testcase_01 AC 1 ms
6,816 KB
testcase_02 AC 1 ms
6,940 KB
testcase_03 AC 1 ms
6,940 KB
testcase_04 AC 1 ms
6,940 KB
testcase_05 AC 1 ms
6,944 KB
testcase_06 AC 1 ms
6,940 KB
testcase_07 AC 1 ms
6,940 KB
testcase_08 AC 1 ms
6,940 KB
testcase_09 AC 1 ms
6,940 KB
testcase_10 AC 1 ms
6,940 KB
testcase_11 AC 48 ms
6,944 KB
testcase_12 AC 8 ms
6,940 KB
testcase_13 AC 37 ms
6,940 KB
testcase_14 AC 102 ms
6,944 KB
testcase_15 AC 85 ms
6,940 KB
testcase_16 AC 6 ms
6,940 KB
testcase_17 AC 28 ms
6,944 KB
testcase_18 AC 50 ms
6,940 KB
testcase_19 AC 3 ms
6,940 KB
testcase_20 AC 1 ms
6,944 KB
testcase_21 AC 50 ms
6,944 KB
testcase_22 AC 136 ms
6,940 KB
testcase_23 AC 49 ms
6,944 KB
testcase_24 AC 262 ms
6,940 KB
testcase_25 AC 5 ms
6,944 KB
testcase_26 AC 4 ms
6,944 KB
testcase_27 AC 3 ms
6,944 KB
testcase_28 AC 8 ms
6,940 KB
testcase_29 AC 1 ms
6,940 KB
testcase_30 AC 54 ms
6,940 KB
testcase_31 AC 263 ms
6,940 KB
testcase_32 AC 246 ms
6,940 KB
testcase_33 AC 243 ms
6,940 KB
testcase_34 AC 218 ms
6,944 KB
testcase_35 AC 265 ms
6,944 KB
testcase_36 AC 1 ms
6,944 KB
testcase_37 AC 1 ms
6,944 KB
testcase_38 AC 262 ms
6,944 KB
testcase_39 AC 66 ms
6,940 KB
testcase_40 AC 70 ms
6,940 KB
testcase_41 AC 70 ms
6,940 KB
testcase_42 AC 1 ms
6,940 KB
testcase_43 AC 1 ms
6,940 KB
testcase_44 AC 1 ms
6,944 KB
testcase_45 AC 1 ms
6,944 KB
testcase_46 AC 51 ms
6,944 KB
testcase_47 AC 54 ms
6,944 KB
testcase_48 AC 61 ms
6,940 KB
testcase_49 AC 60 ms
6,940 KB
testcase_50 AC 60 ms
6,944 KB
testcase_51 AC 60 ms
6,940 KB
testcase_52 AC 116 ms
6,944 KB
testcase_53 AC 113 ms
6,944 KB
testcase_54 AC 117 ms
6,944 KB
testcase_55 AC 88 ms
6,940 KB
testcase_56 AC 1 ms
6,940 KB
testcase_57 AC 1 ms
6,940 KB
testcase_58 AC 1 ms
6,940 KB
testcase_59 AC 35 ms
6,940 KB
testcase_60 AC 1 ms
6,940 KB
testcase_61 AC 35 ms
6,940 KB
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 #

fn main() {
	let mut io = IO::new();
    input!{ from io,
		n: usize, m: usize, mut k: i64,
		ed:[(usize, usize); m]
    }
	let mut a = vec![vec![false; n]; n];
	for &(u, v) in &ed {
		a[u][v] = true;
	}
	let mut res = vec![vec![false; n]; n];
	for i in 0..n {
		res[i][i] = true;
	}
	while k > 0 {
		if k & 1 == 1 {
			res = mult(&res, &a);
		}
		a = mult(&a, &a);
		k >>= 1;
	}
    io.println(res[0].iter().filter(|&&x| x).count());
}

fn mult(a: &[Vec<bool>], b: &[Vec<bool>]) -> Vec<Vec<bool>> {
	let n = a.len();
	let mut c = vec![vec![false; n]; n];
	for i in 0..n {
		for j in 0..n {
			for k in 0..n {
				c[i][j] |= a[i][k] & b[k][j];
			}
		}
	}
	c
}

// ------------ io module start ------------
use std::io::{stdout, BufWriter, Read, StdoutLock, Write};

pub struct IO {
	iter: std::str::SplitAsciiWhitespace<'static>,
	buf: BufWriter<StdoutLock<'static>>,
}

impl IO {
	pub fn new() -> Self {
		let mut input = String::new();
		std::io::stdin().read_to_string(&mut input).unwrap();
		let input = Box::leak(input.into_boxed_str());
		let out = Box::new(stdout());
		IO {
			iter: input.split_ascii_whitespace(),
			buf: BufWriter::new(Box::leak(out).lock()),
		}
	}
	fn scan_str(&mut self) -> &'static str {
		self.iter.next().unwrap()
	}
	pub fn scan<T: Scan>(&mut self) -> <T as Scan>::Output {
		<T as Scan>::scan(self)
	}
	pub fn scan_vec<T: Scan>(&mut self, n: usize) -> Vec<<T as Scan>::Output> {
		(0..n).map(|_| self.scan::<T>()).collect()
	}
	pub fn print<T: Print>(&mut self, x: T) {
		<T as Print>::print(self, x);
	}
	pub fn println<T: Print>(&mut self, x: T) {
		self.print(x);
		self.print("\n");
	}
	pub fn iterln<T: Print, I: Iterator<Item = T>>(&mut self, mut iter: I, delim: &str) {
		if let Some(v) = iter.next() {
			self.print(v);
			for v in iter {
				self.print(delim);
				self.print(v);
			}
		}
		self.print("\n");
	}
	pub fn flush(&mut self) {
		self.buf.flush().unwrap();
	}
}

impl Default for IO {
	fn default() -> Self {
		Self::new()
	}
}

pub trait Scan {
	type Output;
	fn scan(io: &mut IO) -> Self::Output;
}

macro_rules! impl_scan {
	($($t:tt),*) => {
		$(
			impl Scan for $t {
				type Output = Self;
				fn scan(s: &mut IO) -> Self::Output {
					s.scan_str().parse().unwrap()
				}
			}
		)*
	};
}

impl_scan!(i16, i32, i64, isize, u16, u32, u64, usize, String);

pub enum Bytes {}
impl Scan for Bytes {
	type Output = &'static [u8];
	fn scan(s: &mut IO) -> Self::Output {
		s.scan_str().as_bytes()
	}
}

pub enum Chars {}
impl Scan for Chars {
	type Output = Vec<char>;
	fn scan(s: &mut IO) -> Self::Output {
		s.scan_str().chars().collect()
	}
}

pub enum Usize1 {}
impl Scan for Usize1 {
	type Output = usize;
	fn scan(s: &mut IO) -> Self::Output {
		s.scan::<usize>().wrapping_sub(1)
	}
}

impl<T: Scan, U: Scan> Scan for (T, U) {
	type Output = (T::Output, U::Output);
	fn scan(s: &mut IO) -> Self::Output {
		(T::scan(s), U::scan(s))
	}
}

impl<T: Scan, U: Scan, V: Scan> Scan for (T, U, V) {
	type Output = (T::Output, U::Output, V::Output);
	fn scan(s: &mut IO) -> Self::Output {
		(T::scan(s), U::scan(s), V::scan(s))
	}
}

impl<T: Scan, U: Scan, V: Scan, W: Scan> Scan for (T, U, V, W) {
	type Output = (T::Output, U::Output, V::Output, W::Output);
	fn scan(s: &mut IO) -> Self::Output {
		(T::scan(s), U::scan(s), V::scan(s), W::scan(s))
	}
}

pub trait Print {
	fn print(w: &mut IO, x: Self);
}

macro_rules! impl_print_int {
	($($t:ty),*) => {
		$(
			impl Print for $t {
				fn print(w: &mut IO, x: Self) {
					w.buf.write_all(x.to_string().as_bytes()).unwrap();
				}
			}
		)*
	};
}

impl_print_int!(i16, i32, i64, isize, u16, u32, u64, usize);

impl Print for u8 {
	fn print(w: &mut IO, x: Self) {
		w.buf.write_all(&[x]).unwrap();
	}
}

impl Print for &[u8] {
	fn print(w: &mut IO, x: Self) {
		w.buf.write_all(x).unwrap();
	}
}

impl Print for &str {
	fn print(w: &mut IO, x: Self) {
		w.print(x.as_bytes());
	}
}

impl Print for String {
	fn print(w: &mut IO, x: Self) {
		w.print(x.as_bytes());
	}
}

impl<T: Print, U: Print> Print for (T, U) {
	fn print(w: &mut IO, (x, y): Self) {
		w.print(x);
		w.print(" ");
		w.print(y);
	}
}

impl<T: Print, U: Print, V: Print> Print for (T, U, V) {
	fn print(w: &mut IO, (x, y, z): Self) {
		w.print(x);
		w.print(" ");
		w.print(y);
		w.print(" ");
		w.print(z);
	}
}

mod neboccoio_macro {
	#[macro_export]
	macro_rules! input {
		(@start $io:tt @read @rest) => {};

		(@start $io:tt @read @rest, $($rest: tt)*) => {
			input!(@start $io @read @rest $($rest)*)
		};

		(@start $io:tt @read @rest mut $($rest:tt)*) => {
			input!(@start $io @read @mut [mut] @rest $($rest)*)
		};

		(@start $io:tt @read @rest $($rest:tt)*) => {
			input!(@start $io @read @mut [] @rest $($rest)*)
		};

		(@start $io:tt @read @mut [$($mut:tt)?] @rest $var:tt: [$kind:tt; $len:tt] $($rest:tt)*) => {
			let $($mut)* $var = $io.scan_vec::<$kind>($len);
			input!(@start $io @read @rest $($rest)*)
		};

		(@start $io:tt @read @mut [$($mut:tt)?] @rest $var:tt: $kind:tt $($rest:tt)*) => {
			let $($mut)* $var = $io.scan::<$kind>();
			input!(@start $io @read @rest $($rest)*)
		};

		(from $io:tt $($rest:tt)*) => {
			input!(@start $io @read @rest $($rest)*)
		};
	}
}

// ------------ io module end ------------
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