結果
| 問題 |
No.59 鉄道の旅
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2017-02-20 22:25:03 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,398 bytes |
| コンパイル時間 | 22,480 ms |
| コンパイル使用メモリ | 379,436 KB |
| 実行使用メモリ | 6,144 KB |
| 最終ジャッジ日時 | 2024-12-30 11:25:30 |
| 合計ジャッジ時間 | 16,901 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 9 WA * 3 |
コンパイルメッセージ
warning: use of deprecated method `std::error::Error::description`: use the Display impl or to_string()
--> src/main.rs:95:62
|
95 | Err(why) => panic!("error in read_line: {}", why.description()),
| ^^^^^^^^^^^
|
= note: `#[warn(deprecated)]` on by default
ソースコード
use std::io::{self, Stdin};
use std::str::{self, FromStr};
use std::error::Error;
use std::thread;
fn exec() {
let mut sc = Scanner::new();
let n: usize = sc.ne();
let k: i32 = sc.ne();
let w: Vec<i32> = (0..n).map(|_| sc.ne()).collect();
let &ma = w.iter().max().unwrap();
let n = ma as usize;
let mut fwt = FenwickTree::new(n + 1, 0i32);
for x in w {
if x < 0 {
let id = (x * -1) as usize;
let num = fwt.sum(id + 1) - fwt.sum(id);
if num > 0 {
fwt.add(id, -1);
}
} else {
let id = x as usize;
let num = fwt.sum(n + 1) - fwt.sum(id);
if num < k {
fwt.add(id, 1);
}
}
}
println!("{}", fwt.sum(n + 1));
}
struct FenwickTree<T> {
zero: T,
n: usize,
data: Vec<T>,
}
use std::ops::AddAssign;
impl<T: Copy + AddAssign> FenwickTree<T> {
fn new(n_: usize, z_: T) -> FenwickTree<T> {
FenwickTree {
zero: z_,
n: n_,
data: vec![z_; n_],
}
}
//sum of [0, j)
fn sum(&self, j: usize) -> T {
let mut res = self.zero;
let mut x = j as i64 - 1;
while x >= 0 {
res += self.data[x as usize];
x = (x & (x + 1)) - 1;
}
res
}
// add w to a[j]
fn add(&mut self, j: usize, w: T) {
let mut x = j;
while x < self.n {
self.data[x] += w;
x |= x + 1;
}
}
}
fn main() {
const DEFAULT_STACK: usize = 16 * 1024 * 1024;
let builder = thread::Builder::new();
let th = builder.stack_size(DEFAULT_STACK);
let handle = th.spawn(|| { exec(); }).unwrap();
let _ = handle.join();
}
#[allow(dead_code)]
struct Scanner {
stdin: Stdin,
id: usize,
buf: Vec<u8>,
}
#[allow(dead_code)]
impl Scanner {
fn new() -> Scanner {
Scanner {
stdin: io::stdin(),
id: 0,
buf: Vec::new(),
}
}
fn next_line(&mut self) -> Option<String> {
let mut res = String::new();
match self.stdin.read_line(&mut res) {
Ok(0) => return None,
Ok(_) => Some(res),
Err(why) => panic!("error in read_line: {}", why.description()),
}
}
fn next<T: FromStr>(&mut self) -> Option<T> {
while self.buf.len() == 0 {
self.buf = match self.next_line() {
Some(r) => {
self.id = 0;
r.trim().as_bytes().to_owned()
}
None => return None,
};
}
let l = self.id;
assert!(self.buf[l] != b' ');
let n = self.buf.len();
let mut r = l;
while r < n && self.buf[r] != b' ' {
r += 1;
}
let res = match str::from_utf8(&self.buf[l..r]).ok().unwrap().parse::<T>() {
Ok(s) => Some(s),
Err(_) => {
panic!("parse error, {:?}",
String::from_utf8(self.buf[l..r].to_owned()))
}
};
while r < n && self.buf[r] == b' ' {
r += 1;
}
if r == n {
self.buf.clear();
} else {
self.id = r;
}
res
}
fn ne<T: FromStr>(&mut self) -> T {
self.next::<T>().unwrap()
}
}