#621032 (Rust) No.1339 循環小数

• 問題: No.1339 循環小数
• ユーザー: ziita
• 提出日時: 2021-02-22 01:08:17
• 言語: Rust (1.77.0 + proconio)
• 結果: AC
• 実行時間: 45 ms / 2,000 ms
• コード長: 4,607 bytes
• コンパイル時間: 14,429 ms
• コンパイル使用メモリ: 378,852 KB
• 実行使用メモリ: 5,376 KB
• 最終ジャッジ日時: 2024-09-19 21:18:03
• 合計ジャッジ時間: 14,962 ms
• ジャッジサーバーID （参考情報）: judge1 / judge2

入力	結果	実行時間; 実行使用メモリ
testcase_00	AC	1 ms; 5,248 KB
testcase_01	AC	2 ms; 5,376 KB
testcase_02	AC	2 ms; 5,376 KB
testcase_03	AC	2 ms; 5,376 KB
testcase_04	AC	2 ms; 5,376 KB
testcase_05	AC	2 ms; 5,376 KB
testcase_06	AC	2 ms; 5,376 KB
testcase_07	AC	2 ms; 5,376 KB
testcase_08	AC	2 ms; 5,376 KB
testcase_09	AC	2 ms; 5,376 KB
testcase_10	AC	2 ms; 5,376 KB
testcase_11	AC	4 ms; 5,376 KB
testcase_12	AC	4 ms; 5,376 KB
testcase_13	AC	4 ms; 5,376 KB
testcase_14	AC	4 ms; 5,376 KB
testcase_15	AC	4 ms; 5,376 KB
testcase_16	AC	4 ms; 5,376 KB
testcase_17	AC	4 ms; 5,376 KB
testcase_18	AC	4 ms; 5,376 KB
testcase_19	AC	4 ms; 5,376 KB
testcase_20	AC	5 ms; 5,376 KB
testcase_21	AC	37 ms; 5,376 KB
testcase_22	AC	37 ms; 5,376 KB
testcase_23	AC	36 ms; 5,376 KB
testcase_24	AC	36 ms; 5,376 KB
testcase_25	AC	36 ms; 5,376 KB
testcase_26	AC	34 ms; 5,376 KB
testcase_27	AC	39 ms; 5,376 KB
testcase_28	AC	35 ms; 5,376 KB
testcase_29	AC	36 ms; 5,376 KB
testcase_30	AC	34 ms; 5,376 KB
testcase_31	AC	42 ms; 5,376 KB
testcase_32	AC	45 ms; 5,376 KB
testcase_33	AC	42 ms; 5,376 KB
testcase_34	AC	13 ms; 5,376 KB
testcase_35	AC	29 ms; 5,376 KB
testcase_36	AC	39 ms; 5,376 KB

ソースコード

#![allow(unused_imports)]
#![allow(non_snake_case, unused)]

use std::cmp::*;
use std::collections::*;
use std::ops::*;

// https://atcoder.jp/contests/hokudai-hitachi2019-1/submissions/10518254 より

macro_rules! eprint {
    ($($t:tt)*) => {{
        use ::std::io::Write;
        let _ = write!(::std::io::stderr(), $($t)*);
    }};
}
macro_rules! eprintln {
    () => { eprintln!(""); };
    ($($t:tt)*) => {{
        use ::std::io::Write;
        let _ = writeln!(::std::io::stderr(), $($t)*);
    }};
}
macro_rules! dbg {
    ($v:expr) => {{
        let val = $v;
        eprintln!("[{}:{}] {} = {:?}", file!(), line!(), stringify!($v), val);
        val
    }}
}

macro_rules! mat {
    ($($e:expr),*) => { Vec::from(vec![$($e),*]) };
    ($($e:expr,)*) => { Vec::from(vec![$($e),*]) };
    ($e:expr; $d:expr) => { Vec::from(vec![$e; $d]) };
    ($e:expr; $d:expr $(; $ds:expr)+) => { Vec::from(vec![mat![$e $(; $ds)*]; $d]) };
}

macro_rules! ok {
    ($a:ident$([$i:expr])*.$f:ident()$(@$t:ident)*) => {
        $a$([$i])*.$f($($t),*)
    };
    ($a:ident$([$i:expr])*.$f:ident($e:expr$(,$es:expr)*)$(@$t:ident)*) => { {
        let t = $e;
        ok!($a$([$i])*.$f($($es),*)$(@$t)*@t)
    } };
}

pub fn readln() -> String {
    let mut line = String::new();
    ::std::io::stdin().read_line(&mut line).unwrap_or_else(|e| panic!("{}", e));
    line
}

macro_rules! read {
    ($($t:tt),*; $n:expr) => {{
        let stdin = ::std::io::stdin();
        let ret = ::std::io::BufRead::lines(stdin.lock()).take($n).map(|line| {
            let line = line.unwrap();
            let mut it = line.split_whitespace();
            _read!(it; $($t),*)
        }).collect::<Vec<_>>();
        ret
    }};
    ($($t:tt),*) => {{
        let line = readln();
        let mut it = line.split_whitespace();
        _read!(it; $($t),*)
    }};
}

macro_rules! _read {
    ($it:ident; [char]) => {
        _read!($it; String).chars().collect::<Vec<_>>()
    };
    ($it:ident; [u8]) => {
        Vec::from(_read!($it; String).into_bytes())
    };
    ($it:ident; usize1) => {
        $it.next().unwrap_or_else(|| panic!("input mismatch")).parse::<usize>().unwrap_or_else(|e| panic!("{}", e)) - 1
    };
    ($it:ident; [usize1]) => {
        $it.map(|s| s.parse::<usize>().unwrap_or_else(|e| panic!("{}", e)) - 1).collect::<Vec<_>>()
    };
    ($it:ident; [$t:ty]) => {
        $it.map(|s| s.parse::<$t>().unwrap_or_else(|e| panic!("{}", e))).collect::<Vec<_>>()
    };
    ($it:ident; $t:ty) => {
        $it.next().unwrap_or_else(|| panic!("input mismatch")).parse::<$t>().unwrap_or_else(|e| panic!("{}", e))
    };
    ($it:ident; $($t:tt),+) => {
        ($(_read!($it; $t)),*)
    };
}


pub fn main() {
    let _ = ::std::thread::Builder::new().name("run".to_string()).stack_size(32 * 1024 * 1024).spawn(run).unwrap().join();
}

const MOD: usize = 998244353;
// const MOD: usize = 1_000_000_007;
// const INF: i64 = std::i64::MAX;
const INF: usize = std::usize::MAX;
// const INF: i128 = std::i128::MAX/100;

fn solve() {
    let t = read!(usize);
    for i in 0..t {
        let n = read!(i64);
        let mut t = n;
        while t%2==0 {
            t /= 2;
        }
        while t%5==0 {
            t /= 5;
        }
        if t==1 {
            println!("1");
            continue;
        }
        let mut x = t;
        let mut f = vec![];
        for j in 2..=t {
            if j*j>t {
                break;
            }
            if x%j!=0 {
                continue;
            }
            f.push(j);
            while x%j==0 {
                x /= j;
            }
        }
        if x!=1 {
            f.push(x);
        }
        let mut phi = t;
        for &f in &f {
            phi = phi*(f-1)/f;
        }
        let mut div = vec![];
        for j in 1..=phi {
            if j*j>phi {
                break;
            }
            if phi%j!=0 {
                continue;
            }
            div.push(j);
            if j*j!=phi{
                div.push(phi/j);
            }
        }
        div.sort();
        let mut ans = phi;
        for &d in &div {
            let mut val = 1;
            let mut b = 10;
            for j in 0..60 {
                if (d>>j)%2==1 {
                    val *= b;
                    val %= t;
                }
                b = (b*b) % t;
            }
            if val==1 {
                ans = min(ans, d);
            }
        }
        println!("{}",ans);
    }

}

fn run() {
    let stack_size = 104_857_600; // 100 MB
    let thd = std::thread::Builder::new().stack_size(stack_size);
    solve();
}