Submission #18895773

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Source Code Expand

use std::cmp::Reverse;
use std::collections::{BTreeSet, BinaryHeap};

fn main() {
    let (r, w) = (std::io::stdin(), std::io::stdout());
    let mut sc = IO::new(r.lock(), w.lock());
    let n: usize = sc.read();
    let k: usize = sc.read();

    let mut done = BTreeSet::new();
    let mut heap = BinaryHeap::new();
    for i in 0..n {
        let a: Vec<usize> = sc.vec(k);
        for j in 0..k {
            heap.push((Reverse(j), Reverse(i), a[j]));
        }

        let mut ans = vec![];
        while let Some((Reverse(rank), Reverse(count), id)) = heap.pop() {
            if done.contains(&id) {
                continue;
            }
            let remain = n - (i + 1);
            if remain * rank + done.len() >= k {
                heap.push((Reverse(rank), Reverse(count), id));
                break;
            }
            done.insert(id);
            ans.push(id);
        }
        ans.sort();
        for (i, ans) in ans.into_iter().enumerate() {
            if i > 0 {
                sc.write(" ");
            }
            sc.write(ans);
        }
        sc.write('\n');
    }
}

pub struct IO<R, W: std::io::Write>(R, std::io::BufWriter<W>);

impl<R: std::io::Read, W: std::io::Write> IO<R, W> {
    pub fn new(r: R, w: W) -> Self {
        Self(r, std::io::BufWriter::new(w))
    }
    pub fn write<S: ToString>(&mut self, s: S) {
        use std::io::Write;
        self.1.write_all(s.to_string().as_bytes()).unwrap();
    }
    pub fn read<T: std::str::FromStr>(&mut self) -> T {
        use std::io::Read;
        let buf = self
            .0
            .by_ref()
            .bytes()
            .map(|b| b.unwrap())
            .skip_while(|&b| b == b' ' || b == b'\n' || b == b'\r' || b == b'\t')
            .take_while(|&b| b != b' ' && b != b'\n' && b != b'\r' && b != b'\t')
            .collect::<Vec<_>>();
        unsafe { std::str::from_utf8_unchecked(&buf) }
            .parse()
            .ok()
            .expect("Parse error.")
    }
    pub fn vec<T: std::str::FromStr>(&mut self, n: usize) -> Vec<T> {
        (0..n).map(|_| self.read()).collect()
    }
    pub fn chars(&mut self) -> Vec<char> {
        self.read::<String>().chars().collect()
    }
}

Submission Info

Judge Result