#472754 (Rust) No.711 競技レーティング単調増加

• 問題: No.711 競技レーティング単調増加
• ユーザー: cotton_fn_
• 提出日時: 2020-04-30 03:50:51
• 言語: Rust (1.77.0)
• 結果: AC
• 実行時間: 73 ms / 2,000 ms
• コード長: 5,042 bytes
• コンパイル時間: 1,880 ms
• コンパイル使用メモリ: 171,660 KB
• 実行使用メモリ: 10,720 KB
• 最終ジャッジ日時: 2023-08-20 19:40:44
• 合計ジャッジ時間: 5,682 ms
• ジャッジサーバーID （参考情報）: judge14 / judge13

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 4,380 KB
testcase_01	AC	1 ms; 4,380 KB
testcase_02	AC	1 ms; 4,380 KB
testcase_03	AC	1 ms; 4,380 KB
testcase_04	AC	1 ms; 4,384 KB
testcase_05	AC	1 ms; 4,380 KB
testcase_06	AC	1 ms; 4,380 KB
testcase_07	AC	1 ms; 4,380 KB
testcase_08	AC	1 ms; 4,376 KB
testcase_09	AC	1 ms; 4,380 KB
testcase_10	AC	1 ms; 4,376 KB
testcase_11	AC	1 ms; 4,376 KB
testcase_12	AC	1 ms; 4,376 KB
testcase_13	AC	1 ms; 4,380 KB
testcase_14	AC	1 ms; 4,380 KB
testcase_15	AC	1 ms; 4,380 KB
testcase_16	AC	1 ms; 4,380 KB
testcase_17	AC	1 ms; 4,376 KB
testcase_18	AC	59 ms; 7,616 KB
testcase_19	AC	57 ms; 7,356 KB
testcase_20	AC	60 ms; 7,636 KB
testcase_21	AC	64 ms; 7,900 KB
testcase_22	AC	62 ms; 7,528 KB
testcase_23	AC	70 ms; 8,476 KB
testcase_24	AC	66 ms; 8,196 KB
testcase_25	AC	54 ms; 6,980 KB
testcase_26	AC	61 ms; 7,540 KB
testcase_27	AC	54 ms; 6,944 KB
testcase_28	AC	31 ms; 6,356 KB
testcase_29	AC	37 ms; 7,212 KB
testcase_30	AC	51 ms; 6,580 KB
testcase_31	AC	71 ms; 7,384 KB
testcase_32	AC	73 ms; 7,536 KB
testcase_33	AC	34 ms; 6,364 KB
testcase_34	AC	32 ms; 6,024 KB
testcase_35	AC	35 ms; 6,776 KB
testcase_36	AC	25 ms; 9,288 KB
testcase_37	AC	48 ms; 10,720 KB
testcase_38	AC	42 ms; 9,384 KB
testcase_39	AC	19 ms; 5,592 KB
testcase_40	AC	19 ms; 4,944 KB
testcase_41	AC	1 ms; 4,380 KB
testcase_42	AC	9 ms; 4,380 KB
testcase_43	AC	39 ms; 7,384 KB

コンパイルメッセージ

warning: unnecessary parentheses around assigned value
  --> Main.rs:35:16
   |
35 |         a[i] = (a[i] - i as i32)/*.max(1)*/;
   |                ^               ^
   |
   = note: `#[warn(unused_parens)]` on by default
help: remove these parentheses
   |
35 -         a[i] = (a[i] - i as i32)/*.max(1)*/;
35 +         a[i] = a[i] - i as i32/*.max(1)*/;
   |

warning: 1 warning emitted

ソースコード

#![allow(unused_imports, unused_macros)]

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

fn main() -> io::Result<()> {
    std::thread::Builder::new()
        .stack_size(64 * 1024 * 1024)
        .spawn(solve)?
        .join()
        .unwrap();
    Ok(())
}

fn solve() {
    let stdin = io::stdin();
    let mut kin = KInput::new(stdin.lock());
    let stdout = io::stdout();
    let mut out = io::BufWriter::new(stdout.lock());
    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: usize = kin.input();
    let mut a: Vec<i32> = kin.seq(n);
    let mut map = BTreeMap::new();
    for i in 0..n {
        a[i] = (a[i] - i as i32)/*.max(1)*/;
        map.insert(a[i], 0);
    }
    for (i, v) in map.values_mut().enumerate() {
        *v = i;
    }

    let mut ft = FenwickTree::new(n + 1, || 0, |&x, &y| x.max(y));
    for i in 0..n {
        if a[i] > 0 {
            let x = *map.get(&a[i]).unwrap();
            ft.apply(x, ft.fold(x + 1) + 1);
        }
    }
    let lis = ft.fold(n);
    outputln!("{}", n - lis);
}
pub struct FenwickTree<T, F, Z> {
    a: Vec<T>,
    f: F,
    z: Z,
}
impl<T, F: Fn(&T, &T) -> T, Z: Fn() -> T> FenwickTree<T, F, Z> {
    pub fn new(n: usize, z: Z, f: F) -> Self {
        Self {
            a: std::iter::repeat_with(&z).take(n + 1).collect(),
            f,
            z,
        }
    }
    pub fn apply(&mut self, mut i: usize, x: T) {
        i += 1;
        while i < self.a.len() {
            self.a[i] = (self.f)(&self.a[i], &x);
            i += i & (!i + 1);
        }
    }
    // [0, i)
    pub fn fold(&self, mut i: usize) -> T {
        let mut s = (self.z)();
        while i > 0 {
            s = (self.f)(&self.a[i], &s);
            i -= i & (!i + 1);
        }
        s
    }
}
// -----------------------------------------------------------------------------
pub mod kyoproio {
    use std::io::prelude::*;
    pub trait Input {
        fn str(&mut self) -> &str;
        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: String,
        pos: usize,
    }
    impl<R: BufRead> KInput<R> {
        pub fn new(src: R) -> Self {
            Self {
                src,
                buf: String::with_capacity(1024),
                pos: 0,
            }
        }
    }
    impl<R: BufRead> Input for KInput<R> {
        fn str(&mut self) -> &str {
            loop {
                if self.pos >= self.buf.len() {
                    self.pos = 0;
                    self.buf.clear();
                    if self.src.read_line(&mut self.buf).expect("io error") == 0 {
                        return &self.buf;
                    }
                }
                let range = self.pos
                    ..self.buf[self.pos..]
                        .find(|c: char| c.is_ascii_whitespace())
                        .map(|i| i + self.pos)
                        .unwrap_or_else(|| self.buf.len());
                self.pos = range.end + 1;
                if range.end > range.start {
                    return &self.buf[range];
                }
            }
        }
    }
    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.str().as_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>().expect("parse error")
                }
            })*
        }
    }
    from_str_impl! {
        String char bool f32 f64 isize i8 i16 i32 i64 i128 usize u8 u16 u32 u64 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);
}