結果

問題 No.5011 Better Mo's Algorithm is Needed!! (Weighted)
コンテスト
ユーザー rhoo
提出日時 2022-12-18 01:12:03
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 4,991 ms / 5,000 ms
コード長 7,496 bytes
コンパイル時間 2,297 ms
実行使用メモリ 23,604 KB
スコア 44,293,798,486
最終ジャッジ日時 2022-12-18 01:26:55
合計ジャッジ時間 646,619 ms
ジャッジサーバーID
（参考情報） 		judge16 / judge10
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ファイルパターン 結果
other AC * 120
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コンパイルメッセージ
warning: unused macro definition: `param`
  --> Main.rs:83:14
   |
83 | macro_rules! param{
   |              ^^^^^
   |
   = note: `#[warn(unused_macros)]` on by default

warning: unused import: `std::mem`
   --> Main.rs:134:5
    |
134 | use std::mem;
    |     ^^^^^^^^
    |
    = note: `#[warn(unused_imports)]` on by default

warning: function is never used: `min_max`
   --> Main.rs:143:4
    |
143 | fn min_max(a:usize,b:usize)->(usize,usize){
    |    ^^^^^^^
    |
    = note: `#[warn(dead_code)]` on by default

warning: field is never read: `wt`
   --> Main.rs:160:5
    |
160 |     wt:usize,
    |     ^^^^^^^^

warning: field is never read: `st`
   --> Main.rs:161:5
    |
161 |     st:usize,
    |     ^^^^^^^^

warning: associated function is never used: `score`
   --> Main.rs:241:8
    |
241 |     fn score(&self)->i64{
    |        ^^^^^

warning: 6 warnings emitted

ソースコード

diff # 

#![allow(non_snake_case)]


#[inline]
fn get_time_secs()->f64{
    std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap().as_secs_f64()
}


struct Timer(f64);
impl Timer{
    #[inline]
    fn new()->Timer{
        Timer(get_time_secs())
    }

    #[inline]
    fn get_time(&self)->f64{
        get_time_secs()-self.0
    }
}


#[cfg(local)]
macro_rules! log{
    ()=>{};

    ($x:literal)=>{
        eprintln!("{}",$x);
    };
    
    ($x:ident $(,)?)=>{
        log!(@out $x,$x);
    };
    ($x:ident,$t:ident $(,)?)=>{
        log!(@out $x,$x);
        log!($t);
    };
    ($x:ident,$($_:ident).* $(,)?)=>{
        compile_error!();
    };
    ($x:ident,$t:expr $(,)?)=>{
        log!(@out $x,$t);
    };
    ($($x:ident).* $(,)?)=>{
        log!(@last $($x).*;$($x).*);
    };

    ($x:ident,$t:ident,$($rest:tt)*)=>{
        log!(@out $x,$x);
        log!($t,$($rest)*);
    };
    ($x:ident,$($_:ident).*,$($rest:tt)*)=>{
        compile_error!();
    };
    ($x:ident,$t:expr,$($rest:tt)*)=>{
        log!(@out $x,$t);
        log!($($rest)*);
    };
    ($($x:ident).*,$($rest:tt)*)=>{
        log!(@last $($x).*;$($x).*);
        log!($($rest)*);
    };

    (@out $x:ident,$t:expr)=>{
        eprintln!("{} = {:?}",stringify!($x),$t);
    };

    (@last $x:ident;$full:expr)=>{
        log!(@out $x,$full);
    };
    (@last $_:ident. $($rest:ident).*;$full:expr)=>{
        log!(@last $($rest).*;$full)
    }
}

#[cfg(not(local))]
macro_rules! log{
    ($($_:tt)*)=>{}
}


macro_rules! param{
    ($($x:ident:$t:ty=$v:literal),* $(,)?)=>{
        #[allow(non_snake_case)]
        struct Param{
            $($x:$t),*
        }
        impl Param{
            #[inline]
            fn new()->Self{
                Self{
                    $(
                        $x:match std::env::var(stringify!($x)){
                            Ok(s)=>s.parse().expect("parse error"),
                            Err(_)=>$v
                        }
                    ),*
                }
            }
        }
    };
}


#[allow(unused)]
struct Scanner{
    stack:std::str::SplitAsciiWhitespace<'static>
}
#[allow(unused)]
impl Scanner{
    #[inline]
    fn new()->Self{
        Self{stack:"".split_ascii_whitespace()}
    }

    #[inline]
    fn read<T:std::str::FromStr>(&mut self)->T{
        loop{
            if let Some(v)=self.stack.next(){
                return v.parse::<T>().unwrap_or_else(|_|panic!("{}: parse error",std::any::type_name::<T>()));
            }

            let mut tmp=String::new();
            std::io::stdin().read_line(&mut tmp).unwrap();
            assert!(!tmp.is_empty());
            self.stack=Box::leak(tmp.into_boxed_str()).split_ascii_whitespace();
        }
    }
}


use std::io::*;
use std::mem;
use std::cmp::Reverse;


const N:usize=200000;
const Q:usize=200000;


#[inline]
fn min_max(a:usize,b:usize)->(usize,usize){
    if a>b{
        (b,a)
    }
    else{
        (a,b)
    }
}


#[inline]
fn abs_diff(a:usize,b:usize)->usize{
    (a as i64-b as i64).abs() as usize
}


struct Out{
    wt:usize,
    st:usize,
    // sum:Vec<usize>,
    route:Vec<(usize,usize,usize)>
}
impl Out{
    #[inline]
    fn input()->Out{
        let mut scan=Scanner::new();
        let n:usize=scan.read();
        let q:usize=scan.read();
        let wt:usize=scan.read();
        let st:usize=scan.read();
        assert_eq!((n,q),(N,Q));

        let mut sum=Vec::with_capacity(N);
        sum.push(0);
        for _ in 0..n{
            let v:usize=scan.read();
            sum.push(sum.last().unwrap().clone()+v);
        }

        let mut route=Vec::with_capacity(Q);
        for i in 0..Q{
            let l:usize=scan.read();
            let r=scan.read::<usize>()-1;
            route.push((sum[l],sum[r],i));
        }

        Out{wt,st,route}
    }
    #[inline]
    fn greedy(&mut self){
        const D:usize=15;
        self.route[1..].sort_unstable();
        let mut block0=vec![Vec::with_capacity(Q/D);D];
        let w=Q/D;
        for i in 0..Q{
            block0[(i/w).min(D-1)].push(self.route[i]);
        }
        let mut block1=vec![vec![Vec::with_capacity(Q/(D*D));D];D];
        for i in 0..D{
            block0[i].sort_unstable_by_key(|(_,r,_)|*r);
            let w=block0[i].len()/D;
            for j in 0..block0[i].len(){
                block1[i][(j/w).min(D-1)].push(block0[i][j]);
            }
        }
        let mut blocks=Vec::with_capacity(D*D);
        for (i,b0) in block1.into_iter().enumerate(){
            for (j,b1) in b0.into_iter().enumerate(){
                blocks.push((i,j,b1));
            }
        }
        blocks.sort_unstable_by_key(|&(y,x,_)|{
            if D&1!=y&1{
                Reverse((y,!x))
            }
            else{
                Reverse((y,x))
            }
        });

        self.route.clear();
        for (_,_,mut block) in blocks{
            while !block.is_empty(){
                let arg_max=if self.route.is_empty(){
                    (0..block.len()).min_by_key(|&i|self.get_first(block[i])).unwrap()
                }
                else{
                    let last=self.route.last().unwrap().clone();
                    (0..block.len()).min_by_key(|&i|self.get(last,block[i])).unwrap()
                };
                self.route.push(block.swap_remove(arg_max));
            }
        }

        assert_eq!(self.route.len(),Q);
    }

    #[inline]
    fn score(&self)->i64{
        let mut ret=self.get_first(self.route[0]);

        for i in 1..self.route.len(){
            ret+=self.dist(i-1,i);
        }

        ret as i64
    }

    #[inline]
    fn get_first(&self,(l,r,_):(usize,usize,usize))->usize{
        l-r
    }

    #[inline]
    fn get(&self,(l0,r0,_):(usize,usize,usize),(l1,r1,_):(usize,usize,usize))->usize{
        abs_diff(l0,l1)+abs_diff(r0,r1)
    }

    #[inline]
    fn dist(&self,a:usize,b:usize)->usize{
        self.get(self.route[a],self.route[b])
    }

    #[inline]
    fn try_2opt(&self,a:usize,b:usize)->i64{
        let old=self.dist(a-1,a)+self.dist(b-1,b);
        let new=self.dist(a-1,b-1)+self.dist(a,b);
        (new-old) as i64
    }

    #[inline]
    fn apply_2opt(&mut self,a:usize,b:usize){
        self.route[a..b].reverse()
    }
}


const TL:f64=4.98;

fn hc(out:&mut Out,d:usize){
    for a in 1..Q-d{
        for b in a+2..a+d{
            let diff=out.try_2opt(a,b);
            if diff<=0{
                out.apply_2opt(a,b);
            }
        }
    }

    log!(score,out.score() as f64/5e7);
}

fn hc_with_timer(out:&mut Out,time:&Timer,d:usize){
    let mut iter=0;
    for a in 1..Q-d{
        for b in a+2..a+d{
            if iter&255==0 && time.get_time()>=TL{
                return;
            }
            iter+=1;
            let diff=out.try_2opt(a,b);
            if diff<=0{
                out.apply_2opt(a,b);
            }
        }
    }

    log!(score,out.score() as f64/5e7);
}


fn main(){
    let time=Timer::new();
    let mut out=Out::input();
    out.greedy();
    log!(init_score,out.score() as f64/5e7);

    hc(&mut out,900);
    hc(&mut out,900);
    hc_with_timer(&mut out,&time,200);
    hc_with_timer(&mut out,&time,200);
    hc_with_timer(&mut out,&time,200);
    hc_with_timer(&mut out,&time,200);
    hc_with_timer(&mut out,&time,500);

    let stdout=stdout();
    let stdout=&mut BufWriter::new(stdout.lock());
    for (_,_,id) in &out.route{
        writeln!(stdout,"{}",id+1).unwrap();
    }
    stdout.flush().unwrap();
}
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