結果

問題 No.1209 XOR Into You
ユーザー o2c
提出日時 2020-09-11 19:56:15
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 144 ms / 2,000 ms
コード長 3,783 bytes
コンパイル時間 18,546 ms
コンパイル使用メモリ 379,836 KB
実行使用メモリ 17,240 KB
最終ジャッジ日時 2024-12-26 14:37:08
合計ジャッジ時間 23,985 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge5
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ファイルパターン 結果
sample AC * 4
other AC * 37
権限があれば一括ダウンロードができます
コンパイルメッセージ
warning: variable does not need to be mutable
  --> src/main.rs:10:338
   |
10 | ...es !read {($($t :tt ) ,*;$n :expr ) =>{{let stdin =::std ::io ::stdin () ;let ret =::std ::io ::BufRead ::lines (stdin .lock () ) .take ($n ) .map (|line |{let line =line .unwrap () ;let mut it =line .split_whitespace () ;_read !(it ;$($t ) ,*) } ) .collect ::<Vec <_ >>() ;ret } } ;($($t :tt ) ,*) =>{{let line =readln () ;let mut it =l...
   |                                                                                                                                                                                                                                                                                                                                            ----^^
   |                                                                                                                                                                                                                                                                                                                                            |
   |                                                                                                                                                                                                                                                                                                                                            help: remove this `mut`
...
67 | ... = read!([usize]);
   |       -------------- in this macro invocation
   |
   = note: `#[warn(unused_mut)]` on by default
   = note: this warning originates in the macro `read` (in Nightly builds, run with -Z macro-backtrace for more info)

warning: variable does not need to be mutable
  --> src/main.rs:10:338
   |
10 | ...es !read {($($t :tt ) ,*;$n :expr ) =>{{let stdin =::std ::io ::stdin () ;let ret =::std ::io ::BufRead ::lines (stdin .lock () ) .take ($n ) .map (|line |{let line =line .unwrap () ;let mut it =li

ソースコード

diff # 

#[allow(unused_imports)]
use std::collections::*;
pub fn readln() -> String {
    let mut line = String::new();
    ::std::io::stdin()
        .read_line(&mut line)
        .unwrap_or_else(|e| panic!("{}", e));
    line
}
macro_rules !read {($($t :tt ) ,*;$n :expr ) =>{{let stdin =::std ::io ::stdin () ;let ret =::std ::io ::BufRead ::lines (stdin .lock () ) .take ($n ) .map (|line |{let line =line .unwrap () ;let mut it =line .split_whitespace () ;_read !(it ;$($t ) ,*) } ) .collect ::<Vec <_ >>() ;ret } } ;($($t :tt ) ,*) =>{{let line =readln () ;let mut it =line .split_whitespace () ;_read !(it ;$($t ) ,*) } } ;}
macro_rules !_read {($it :ident ;[char ] ) =>{_read !($it ;String ) .chars () .collect ::<Vec <_ >>() } ;($it :ident ;[u8 ] ) =>{Vec ::from (_read !($it ;String ) .into_bytes () ) } ;($it :ident ;usize1 ) =>{$it .next () .unwrap_or_else (||panic !("input mismatch" ) ) .parse ::<usize >() .unwrap_or_else (|e |panic !("{}" ,e ) ) -1 } ;($it :ident ;[usize1 ] ) =>{$it .map (|s |s .parse ::<usize >() .unwrap_or_else (|e |panic !("{}" ,e ) ) -1 ) .collect ::<Vec <_ >>() } ;($it :ident ;[$t :ty ] ) =>{$it .map (|s |s .parse ::<$t >() .unwrap_or_else (|e |panic !("{}" ,e ) ) ) .collect ::<Vec <_ >>() } ;($it :ident ;$t :ty ) =>{$it .next () .unwrap_or_else (||panic !("input mismatch" ) ) .parse ::<$t >() .unwrap_or_else (|e |panic !("{}" ,e ) ) } ;($it :ident ;$($t :tt ) ,+) =>{($(_read !($it ;$t ) ) ,*) } ;}

struct FenwickTree<T> {
    n: usize,
    tree: Vec<T>,
    e: T,
}
#[allow(dead_code)]
impl<T: std::ops::AddAssign + Clone> FenwickTree<T> {
    fn new(n: usize, e: T) -> Self {
        FenwickTree {
            n,
            tree: vec![e.clone(); n],
            e,
        }
    }
    /// A[i] += w
    fn add<U: Clone>(&mut self, mut idx: usize, w: U)
    where
        T: std::ops::AddAssign<U>,
    {
        idx += 1;
        while idx <= self.n {
            self.tree[idx - 1] += w.clone();
            idx += idx & idx.wrapping_neg();
        }
    }
    /// return A[0] + ... + A[idx-1]
    fn accum(&self, mut idx: usize) -> T {
        let mut sum = self.e.clone();
        while idx > 0 {
            sum += self.tree[idx - 1].clone();
            idx &= idx - 1;
        }
        sum
    }
    /// return ∑ d[i] for i in R
    fn sum<R>(&self, interval: R) -> T
    where
        T: std::ops::Sub<Output = T>,
        R: std::ops::RangeBounds<usize>,
    {
        let r = match interval.end_bound() {
            std::ops::Bound::Excluded(&a) => a,
            std::ops::Bound::Included(&a) => a + 1,
            _ => self.n,
        };
        match interval.start_bound() {
            std::ops::Bound::Included(&l) => self.accum(r) - self.accum(l),
            _ => self.accum(r),
        }
    }
}

fn main() {
    let n = read!(usize);
    let a = read!([usize]);
    let b = read!([usize]);
    if a[0] != b[0] || a[n - 1] != b[n - 1] {
        println!("-1");
        return;
    }

    let a: Vec<_> = a.windows(2).map(|w| w[0] ^ w[1]).collect();
    let b: Vec<_> = b.windows(2).map(|w| w[0] ^ w[1]).collect();
    let mut c = a.clone();
    let mut d = b.clone();
    c.sort();
    d.sort();
    if c != d {
        println!("-1");
        return;
    }
    c.dedup();

    let m = c.len();
    let map = (0..m).map(|i| (c[i], i)).collect::<BTreeMap<_, _>>();
    let mut q = vec![std::collections::VecDeque::<usize>::new(); m];
    for (i, a) in a.iter().enumerate() {
        q[*map.get(a).unwrap()].push_back(i);
    }

    let mut ft = FenwickTree::new(n - 1, 0i64);
    for i in 0..n - 1 {
        ft.add(i, 1);
    }
    let mut ans = 0;
    for b in b.iter() {
        let i = q[*map.get(b).unwrap()].pop_front().unwrap();
        ans += ft.sum(..i);
        ft.add(i, -1);
    }
    println!("{}", ans);
}
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