結果
| 問題 | No.572 妖精の演奏 | 
| コンテスト | |
| ユーザー |  | 
| 提出日時 | 2017-10-12 14:17:14 | 
| 言語 | Rust (1.83.0 + proconio) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 5 ms / 2,000 ms | 
| コード長 | 2,986 bytes | 
| コンパイル時間 | 14,531 ms | 
| コンパイル使用メモリ | 378,412 KB | 
| 実行使用メモリ | 5,248 KB | 
| 最終ジャッジ日時 | 2024-11-17 10:49:35 | 
| 合計ジャッジ時間 | 15,262 ms | 
| ジャッジサーバーID (参考情報) | judge3 / judge1 | 
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| ファイルパターン | 結果 | 
|---|---|
| other | AC * 20 | 
ソースコード
#[allow(unused_imports)]
use std::cmp::{max, min};
#[allow(unused_imports)]
use std::collections::{HashMap, HashSet};
mod util {
    use std::io::stdin;
    use std::str::FromStr;
    use std::fmt::Debug;
    #[allow(dead_code)]
    pub fn line() -> String {
        let mut line: String = String::new();
        stdin().read_line(&mut line).unwrap();
        line.trim().to_string()
    }
    #[allow(dead_code)]
    pub fn get<T: FromStr>() -> T
    where
        <T as FromStr>::Err: Debug,
    {
        let mut line: String = String::new();
        stdin().read_line(&mut line).unwrap();
        line.trim().parse().unwrap()
    }
    #[allow(dead_code)]
    pub fn gets<T: FromStr>() -> Vec<T>
    where
        <T as FromStr>::Err: Debug,
    {
        let mut line: String = String::new();
        stdin().read_line(&mut line).unwrap();
        line.split_whitespace()
            .map(|t| t.parse().unwrap())
            .collect()
    }
    #[allow(dead_code)]
    pub fn get2<T: FromStr, U: FromStr>() -> (T, U)
    where
        <T as FromStr>::Err: Debug,
        <U as FromStr>::Err: Debug,
    {
        let mut line: String = String::new();
        stdin().read_line(&mut line).unwrap();
        let mut iter = line.split_whitespace();
        (
            iter.next().unwrap().parse().unwrap(),
            iter.next().unwrap().parse().unwrap(),
        )
    }
    #[allow(dead_code)]
    pub fn get3<S: FromStr, T: FromStr, U: FromStr>() -> (S, T, U)
    where
        <S as FromStr>::Err: Debug,
        <T as FromStr>::Err: Debug,
        <U as FromStr>::Err: Debug,
    {
        let mut line: String = String::new();
        stdin().read_line(&mut line).unwrap();
        let mut iter = line.split_whitespace();
        (
            iter.next().unwrap().parse().unwrap(),
            iter.next().unwrap().parse().unwrap(),
            iter.next().unwrap().parse().unwrap(),
        )
    }
}
#[allow(unused_macros)]
macro_rules! debug {
    ($x: expr) => {
        println!("{}: {:?}", stringify!($x), $x)
    }
}
fn main() {
    let n: usize = util::get();
    let m: usize = util::get();
    let a: Vec<Vec<usize>> = (0..m).map(|_| util::gets()).collect();
    let mut dp = vec![vec![vec![0; m]; m]; 40];
    for i in 0..40 {
        for k in 0..m {
            for j in 0..m {
                if i == 0 {
                    dp[i][k][j] = a[k][j];
                } else {
                    for h in 0..m {
                        dp[i][k][j] = max(dp[i][k][j], dp[i - 1][k][h] + dp[i - 1][h][j]);
                    }
                }
            }
        }
    }
    let mut dp2 = vec![0; m];
    for i in 0..40 {
        if ((n - 1) >> i) & 1 != 1 {
            continue;
        }
        let mut next = vec![0; m];
        for k in 0..m {
            for j in 0..m {
                next[k] = max(next[k], dp2[j] + dp[i][j][k]);
            }
        }
        dp2 = next;
    }
    println!("{}", dp2.iter().cloned().max().unwrap())
}
            
            
            
        