#576499 (Rust) No.1283 Extra Fee

• 問題: No.1283 Extra Fee
• ユーザー: cotton_fn_
• 提出日時: 2020-11-06 21:53:09
• 言語: Rust (1.77.0 + proconio)
• 結果: AC
• 実行時間: 133 ms / 2,000 ms
• コード長: 6,964 bytes
• コンパイル時間: 13,320 ms
• コンパイル使用メモリ: 391,148 KB
• 実行使用メモリ: 11,136 KB
• 最終ジャッジ日時: 2024-11-16 06:38:25
• 合計ジャッジ時間: 16,204 ms
• ジャッジサーバーID （参考情報）: judge5 / judge2

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 5,248 KB
testcase_01	AC	1 ms; 5,248 KB
testcase_02	AC	1 ms; 5,248 KB
testcase_03	AC	1 ms; 5,248 KB
testcase_04	AC	1 ms; 5,248 KB
testcase_05	AC	1 ms; 5,248 KB
testcase_06	AC	1 ms; 5,248 KB
testcase_07	AC	1 ms; 5,248 KB
testcase_08	AC	1 ms; 5,248 KB
testcase_09	AC	1 ms; 5,248 KB
testcase_10	AC	1 ms; 5,248 KB
testcase_11	AC	7 ms; 5,248 KB
testcase_12	AC	7 ms; 5,248 KB
testcase_13	AC	4 ms; 5,248 KB
testcase_14	AC	16 ms; 5,248 KB
testcase_15	AC	25 ms; 5,248 KB
testcase_16	AC	6 ms; 5,248 KB
testcase_17	AC	123 ms; 10,496 KB
testcase_18	AC	83 ms; 7,552 KB
testcase_19	AC	88 ms; 7,808 KB
testcase_20	AC	81 ms; 7,552 KB
testcase_21	AC	82 ms; 7,680 KB
testcase_22	AC	75 ms; 7,168 KB
testcase_23	AC	76 ms; 8,064 KB
testcase_24	AC	78 ms; 7,936 KB
testcase_25	AC	90 ms; 8,064 KB
testcase_26	AC	90 ms; 8,192 KB
testcase_27	AC	89 ms; 8,064 KB
testcase_28	AC	90 ms; 8,192 KB
testcase_29	AC	133 ms; 11,136 KB

ソースコード

#![allow(unused_imports, unused_macros)]

use kyoproio::*;
use std::{
    collections::*,
    io::{self, prelude::*},
    iter,
    mem::{replace, swap},
};

fn run<I: Input, O: Write>(mut kin: I, mut out: O) {
    macro_rules! output { ($($args:expr),+) => { write!(&mut out, $($args),+).unwrap(); }; }
    macro_rules! outputln {
        ($($args:expr),+) => { output!($($args),+); outputln!(); };
        () => { output!("\n"); if cfg!(debug_assertions) { out.flush().unwrap(); } }
    }

    let (n, m): (usize, usize) = kin.input();
    let mut fee = vec![vec![0; n]; n];
    for (h, w, c) in kin.iter::<(usize, usize, i64)>().take(m) {
        fee[h - 1][w - 1] = c;
    }
    let mut dist = vec![vec![[i64::max_value(); 2]; n]; n];
    dist[0][0][0] = 0;
    let mut que = BinaryHeap::new();
    que.push((0, 0, 0, 0));
    while let Some((d, i, j, f)) = que.pop() {
        let d = -d;
        if d > dist[i][j][f] {
            continue;
        }
        for &(di, dj) in &[(1, 0), (0, 1), (-1, 0), (0, -1)] {
            let ti = (i as isize + di) as usize;
            let tj = (j as isize + dj) as usize;
            if ti < n && tj < n {
                let td = d + 1 + fee[ti][tj];
                if td < dist[ti][tj][f] {
                    que.push((-td, ti, tj, f));
                    dist[ti][tj][f] = td;
                }
                if f == 0 {
                    let td = d + 1;
                    if td < dist[ti][tj][1] {
                        que.push((-td, ti, tj, 1));
                        dist[ti][tj][1] = td;
                    }
                }
            }
        }
    }
    outputln!("{}", dist[n - 1][n - 1][1]);
}

// -----------------------------------------------------------------------------
fn main() -> io::Result<()> {
    std::thread::Builder::new()
        .stack_size(64 * 1024 * 1024)
        .spawn(|| {
            run(
                KInput::new(io::stdin().lock()),
                io::BufWriter::new(io::stdout().lock()),
            )
        })?
        .join()
        .unwrap();
    Ok(())
}

// -----------------------------------------------------------------------------
pub mod kyoproio {
    use std::io::prelude::*;
    pub trait Input {
        fn bytes(&mut self) -> &[u8];
        fn str(&mut self) -> &str {
            std::str::from_utf8(self.bytes()).unwrap()
        }
        fn input<T: InputParse>(&mut self) -> T {
            T::input(self)
        }
        fn iter<T: InputParse>(&mut self) -> Iter<T, Self> {
            Iter(self, std::marker::PhantomData)
        }
        fn seq<T: InputParse, B: std::iter::FromIterator<T>>(&mut self, n: usize) -> B {
            self.iter().take(n).collect()
        }
    }
    pub struct KInput<R> {
        src: R,
        buf: Vec<u8>,
        pos: usize,
        len: usize,
    }
    impl<R: Read> KInput<R> {
        pub fn new(src: R) -> Self {
            Self {
                src,
                buf: vec![0; 1 << 16],
                pos: 0,
                len: 0,
            }
        }
    }
    impl<R: Read> Input for KInput<R> {
        fn bytes(&mut self) -> &[u8] {
            loop {
                while let Some(delim) = self.buf[self.pos..self.len]
                    .iter()
                    .position(|b| b.is_ascii_whitespace())
                {
                    let range = self.pos..self.pos + delim;
                    self.pos += delim + 1;
                    if delim > 0 {
                        return &self.buf[range];
                    }
                }
                if self.pos > 0 {
                    self.buf.copy_within(self.pos..self.len, 0);
                    self.len -= self.pos;
                    self.pos = 0;
                }
                if self.len >= self.buf.len() {
                    self.buf.resize(2 * self.buf.len(), 0);
                }
                let read = self.src.read(&mut self.buf[self.len..]).unwrap();
                if read == 0 {
                    let range = self.pos..self.len;
                    self.pos = self.len;
                    return &self.buf[range];
                }
                self.len += read;
            }
        }
    }
    pub struct Iter<'a, T, I: ?Sized>(&'a mut I, std::marker::PhantomData<*const T>);
    impl<'a, T: InputParse, I: Input + ?Sized> Iterator for Iter<'a, T, I> {
        type Item = T;
        fn next(&mut self) -> Option<T> {
            Some(self.0.input())
        }
    }
    pub trait InputParse: Sized {
        fn input<I: Input + ?Sized>(src: &mut I) -> Self;
    }
    impl InputParse for Vec<u8> {
        fn input<I: Input + ?Sized>(src: &mut I) -> Self {
            src.bytes().to_owned()
        }
    }
    macro_rules! from_str_impl {
        { $($T:ty)* } => {
            $(impl InputParse for $T {
                fn input<I: Input + ?Sized>(src: &mut I) -> Self {
                    src.str().parse::<$T>().unwrap()
                }
            })*
        }
    }
    from_str_impl! { String char bool f32 f64 }
    macro_rules! parse_int_impl {
        { $($I:ty: $U:ty)* } => {
            $(impl InputParse for $I {
                fn input<I: Input + ?Sized>(src: &mut I) -> Self {
                    let f = |s: &[u8]| s.iter().fold(0, |x, b| 10 * x + (b & 0xf) as $I);
                    let s = src.bytes();
                    if let Some((&b'-', t)) = s.split_first() { -f(t) } else { f(s) }
                }
            }
            impl InputParse for $U {
                fn input<I: Input + ?Sized>(src: &mut I) -> Self {
                    src.bytes().iter().fold(0, |x, b| 10 * x + (b & 0xf) as $U)
                }
            })*
        };
    }
    parse_int_impl! { isize:usize i8:u8 i16:u16 i32:u32 i64:u64 i128:u128 }
    macro_rules! tuple_impl {
        ($H:ident $($T:ident)*) => {
            impl<$H: InputParse, $($T: InputParse),*> InputParse for ($H, $($T),*) {
                fn input<I: Input + ?Sized>(src: &mut I) -> Self {
                    ($H::input(src), $($T::input(src)),*)
                }
            }
            tuple_impl!($($T)*);
        };
        () => {}
    }
    tuple_impl!(A B C D E F G);
    macro_rules! array_impl {
        { $($N:literal)* } => {
            $(impl<T: InputParse> InputParse for [T; $N] {
                fn input<I: Input + ?Sized>(src: &mut I) -> Self {
                    let mut arr = std::mem::MaybeUninit::uninit();
                    unsafe {
                        let ptr = arr.as_mut_ptr() as *mut T;
                        for i in 0..$N {
                            ptr.add(i).write(src.input());
                        }
                        arr.assume_init()
                    }
                }
            })*
        };
    }
    array_impl! { 1 2 3 4 5 6 7 8 }
    #[macro_export]
    macro_rules! kdbg {
        ($($v:expr),*) => {
            if cfg!(debug_assertions) { dbg!($($v),*) } else { ($($v),*) }
        }
    }
}