CODE FESTIVAL 2016 Grand Final

Submission #1202533

Source codeソースコード

#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
use std::io::Read;
#[allow(dead_code)]
fn getline() -> String {
    let mut ret = String::new();
    std::io::stdin().read_line(&mut ret).ok().unwrap();
    ret
}
fn get_word() -> String {
    let mut stdin = std::io::stdin();
    let mut u8b: [u8; 1] = [0];
    loop {
        let mut buf: Vec<u8> = Vec::with_capacity(16);
        loop {
            let res = stdin.read(&mut u8b);
            if res.unwrap_or(0) == 0 || u8b[0] <= b' ' {
                break;
            } else {
                buf.push(u8b[0]);
            }
        }
        if buf.len() >= 1 {
            let ret = String::from_utf8(buf).unwrap();
            return ret;
        }
    }
}

#[allow(dead_code)]
fn get<T: std::str::FromStr>() -> T { get_word().parse().ok().unwrap() }

const MOD: i64 = 1_000_000_007;

// I solved this after I read the editorial.
fn solve() {
    let n = get();
    let a: Vec<i64> = (0 .. n).map(|_| get()).collect();
    let b: Vec<i64> = (0 .. n).map(|_| get()).collect();
    let mut pool = Vec::new();
    for i in 0 .. n {
        pool.push((a[i], 0));
        pool.push((b[i], 1));
    }
    pool.sort();
    let mut prod = 1;

    let mut libra = 0;
    for (_, v) in pool {
        let mut tmp = 1;
        if v == 0 {
            if libra < 0 {
                tmp = -libra;
            }
            libra += 1;
        } else {
            if libra > 0 {
                tmp = libra;
            }
            libra -= 1;
        }
        prod = prod * tmp % MOD;
    }
    println!("{}", prod);
}

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();
}

Submission

Task問題 A - 1D Matching
User nameユーザ名 koba@チーム戦の時は別垢を作れ!
Created time投稿日時
Language言語 Rust (1.15.1)
Status状態 AC
Score得点 500
Source lengthソースコード長 1862 Byte
File nameファイル名
Exec time実行時間 106 ms
Memory usageメモリ使用量 18292 KB

Test case

Set

Set name Score得点 / Max score Cases
Sample - example0.txt,example1.txt
All 500 / 500 000.txt,001.txt,002.txt,003.txt,004.txt,005.txt,006.txt,007.txt,008.txt,009.txt,010.txt,011.txt,example0.txt,example1.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
000.txt AC 65 ms 14588 KB
001.txt AC 25 ms 10620 KB
002.txt AC 33 ms 10620 KB
003.txt AC 37 ms 10492 KB
004.txt AC 94 ms 16500 KB
005.txt AC 106 ms 18292 KB
006.txt AC 106 ms 18292 KB
007.txt AC 106 ms 18292 KB
008.txt AC 106 ms 18292 KB
009.txt AC 106 ms 18292 KB
010.txt AC 106 ms 18292 KB
011.txt AC 106 ms 18292 KB
example0.txt AC 3 ms 8572 KB
example1.txt AC 3 ms 8572 KB