結果
| 問題 |
No.1240 Or Sum of Xor Pair
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-10-01 15:49:41 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,699 bytes |
| コンパイル時間 | 11,486 ms |
| コンパイル使用メモリ | 405,760 KB |
| 実行使用メモリ | 71,552 KB |
| 最終ジャッジ日時 | 2024-07-07 01:20:11 |
| 合計ジャッジ時間 | 19,433 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 29 WA * 1 |
ソースコード
#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
use std::io::{Write, BufWriter};
// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
($($r:tt)*) => {
let stdin = std::io::stdin();
let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock()));
let mut next = move || -> String{
bytes
.by_ref()
.map(|r|r.unwrap() as char)
.skip_while(|c|c.is_whitespace())
.take_while(|c|!c.is_whitespace())
.collect()
};
input_inner!{next, $($r)*}
};
}
macro_rules! input_inner {
($next:expr) => {};
($next:expr, ) => {};
($next:expr, $var:ident : $t:tt $($r:tt)*) => {
let $var = read_value!($next, $t);
input_inner!{$next $($r)*}
};
}
macro_rules! read_value {
($next:expr, [graph1; $len:expr]) => {{
let mut g = vec![vec![]; $len];
let ab = read_value!($next, [(usize1, usize1)]);
for (a, b) in ab {
g[a].push(b);
g[b].push(a);
}
g
}};
($next:expr, ( $($t:tt),* )) => {
( $(read_value!($next, $t)),* )
};
($next:expr, [ $t:tt ; $len:expr ]) => {
(0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
};
($next:expr, chars) => {
read_value!($next, String).chars().collect::<Vec<char>>()
};
($next:expr, usize1) => (read_value!($next, usize) - 1);
($next:expr, [ $t:tt ]) => {{
let len = read_value!($next, usize);
read_value!($next, [$t; len])
}};
($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error"));
}
#[allow(unused)]
macro_rules! debug {
($($format:tt)*) => (write!(std::io::stderr(), $($format)*).unwrap());
}
#[allow(unused)]
macro_rules! debugln {
($($format:tt)*) => (writeln!(std::io::stderr(), $($format)*).unwrap());
}
struct Trie {
l: Option<Box<Trie>>,
r: Option<Box<Trie>>,
zero: [i32; 18],
one: [i32; 18],
}
fn new() -> Trie {
Trie {
l: None,
r: None,
zero: [0; 18],
one: [0; 18],
}
}
fn add(t: &mut Trie, dep: usize, a: i32) {
for i in 0..18 {
if (a & 1 << i) != 0 {
t.one[i] += 1;
} else {
t.zero[i] += 1;
}
}
if dep >= 18 {
return;
}
let now = if (a & 1 << (17 - dep)) != 0 {
1
} else {
0
};
if now == 1 {
if t.r.is_none() {
t.r = Some(Box::new(new()));
}
add(&mut t.r.as_mut().unwrap(), dep + 1, a);
} else {
if t.l.is_none() {
t.l = Some(Box::new(new()));
}
add(&mut t.l.as_mut().unwrap(), dep + 1, a);
}
}
fn or_sum_whole(t: &Trie, a: i32) -> i64 {
let mut s: i64 = 0;
for i in 0..18 {
if (a & 1 << i) != 0 {
s += ((t.zero[i] + t.one[i]) as i64) << i;
} else {
s += (t.one[i] as i64) << i;
}
}
s
}
fn or_sum(t: &Trie, dep: usize, a: i32, x: i32) -> i64 {
if dep >= 18 {
return 0;
}
let now = if (a & 1 << (17 - dep)) != 0 {
1
} else {
0
};
let mut s: i64 = 0;
if now == 0 {
if (x & 1 << (17 - dep)) != 0 {
if let Some(ref l) = t.l {
s += or_sum_whole(l, a);
}
if let Some(ref r) = t.r {
s += or_sum(r, dep + 1, a, x);
}
} else {
if let Some(ref l) = t.l {
s += or_sum(l, dep + 1, a, x);
}
}
} else {
if (x & 1 << (17 - dep)) != 0 {
if let Some(ref r) = t.r {
s += or_sum_whole(r, a);
}
if let Some(ref l) = t.l {
s += or_sum(l, dep + 1, a, x);
}
} else {
if let Some(ref r) = t.r {
s += or_sum(r, dep + 1, a, x);
}
}
}
s
}
fn solve() {
let out = std::io::stdout();
let mut out = BufWriter::new(out.lock());
macro_rules! puts {
($($format:tt)*) => (let _ = write!(out,$($format)*););
}
input! {
n: usize, x: i32,
a: [i32; n],
}
let mut trie = new();
let mut sum = 0;
for &a in &a {
sum += or_sum(&trie, 0, a, x);
add(&mut trie, 0, a);
}
puts!("{}\n", sum);
}
fn main() {
// In order to avoid potential stack overflow, spawn a new thread.
let stack_size = 104_857_600; // 100 MB
let thd = std::thread::Builder::new().stack_size(stack_size);
thd.spawn(|| solve()).unwrap().join().unwrap();
}