CODE FESTIVAL 2016 Grand Final

Submission #1202462

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() }

fn solve() {
    let n = get();
    let a: Vec<i64> = (0 .. n).map(|_| get()).collect();
    let mut goal = a.iter().fold(0, |x, &y| x ^ y);
    const B: usize = 32;
    let mut cnt = [0; B];
    for v in a {
        if v == 0 { continue; }
        let diff = (v ^ (v - 1)).count_ones() as usize - 1;
        cnt[diff] += 1;
    }
    let mut tot = 0;
    for i in (0 .. B).rev() {
        if (goal & 1 << i) == 0 { continue; }
        if cnt[i] == 0 { // impossible
            println!("-1");
            return;
        }
        goal ^= (1 << (i + 1)) - 1;
        tot += 1;
    }
    println!("{}", tot);
}

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 C - Cheating Nim
User nameユーザ名 こば@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 1715 Byte
File nameファイル名
Exec time実行時間 45 ms
Memory usageメモリ使用量 8572 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,012.txt,013.txt,014.txt,015.txt,016.txt,017.txt,018.txt,019.txt,020.txt,021.txt,022.txt,023.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 3 ms 8572 KB
001.txt AC 3 ms 8572 KB
002.txt AC 45 ms 8572 KB
003.txt AC 15 ms 8572 KB
004.txt AC 17 ms 8572 KB
005.txt AC 14 ms 8572 KB
006.txt AC 42 ms 8572 KB
007.txt AC 42 ms 8572 KB
008.txt AC 42 ms 8572 KB
009.txt AC 42 ms 8572 KB
010.txt AC 42 ms 8572 KB
011.txt AC 42 ms 8572 KB
012.txt AC 42 ms 8572 KB
013.txt AC 42 ms 8572 KB
014.txt AC 42 ms 8572 KB
015.txt AC 42 ms 8572 KB
016.txt AC 42 ms 8572 KB
017.txt AC 42 ms 8572 KB
018.txt AC 42 ms 8572 KB
019.txt AC 42 ms 8572 KB
020.txt AC 42 ms 8572 KB
021.txt AC 6 ms 8572 KB
022.txt AC 7 ms 8572 KB
023.txt AC 42 ms 8572 KB
example0.txt AC 3 ms 8572 KB
example1.txt AC 3 ms 8572 KB