結果

問題 No.3179 3 time mod
コンテスト
ユーザー Moss_Local
提出日時 2025-06-13 21:39:01
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 1 ms / 2,000 ms
コード長 3,672 bytes
コンパイル時間 11,478 ms
コンパイル使用メモリ 399,320 KB
実行使用メモリ 7,844 KB
最終ジャッジ日時 2025-06-14 01:39:40
合計ジャッジ時間 12,887 ms
ジャッジサーバーID
（参考情報） 		judge1 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 42
権限があれば一括ダウンロードができます
コンパイルメッセージ
warning: variable does not need to be mutable
   --> src/main.rs:109:9
    |
109 |     let mut vec: Vec<i64> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`
    |
    = note: `#[warn(unused_mut)]` on by default

warning: variable does not need to be mutable
   --> src/main.rs:115:9
    |
115 |     let mut vec: Vec<i64> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:120:9
    |
120 |     let mut vec: Vec<usize> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:125:9
    |
125 |     let mut vec: Vec<usize> = read_vec();
    |         ----^^^
    |         |
    |         help: remove this `mut`

warning: unused variable: `g`
   --> src/main.rs:138:10
    |
138 |     let (g, x, _) = extgcd(a, m);
    |          ^ help: if this is intentional, prefix it with an underscore: `_g`
    |
    = note: `#[warn(unused_variables)]` on by default

ソースコード

diff # 

// -*- coding:utf-8-unix -*-
// #![feature(map_first_last)]
#![allow(dead_code)]
#![allow(unused_imports)]
#![allow(unused_macros)]

use std::cmp::*;
use std::collections::*;
use std::fmt::*;
use std::hash::*;
use std::io::BufRead;
use std::iter::FromIterator;
use std::*;

const INF: i64 = 1223372036854775807;
const UINF: usize = INF as usize;
const LINF: i64 = 2147483647;
const INF128: i128 = 1223372036854775807000000000000;
const MOD1: i64 = 1000000007;
const MOD9: i64 = 998244353;
const MOD: i64 = MOD9;
const UMOD: usize = MOD as usize;
const M_PI: f64 = 3.14159265358979323846;

macro_rules! p {
    ($x:expr) => {
        //if expr
        println!("{}", $x);
    };
}

macro_rules! vp {
    // vector print separate with space
    ($x:expr) => {
        println!(
            "{}",
            $x.iter()
                .map(|x| x.to_string())
                .collect::<Vec<_>>()
                .join(" ")
        );
    };
}

macro_rules! d {
    ($x:expr) => {
        eprintln!("{:?}", $x);
    };
}
macro_rules! yn {
    ($val:expr) => {
        if $val {
            println!("Yes");
        } else {
            println!("No");
        }
    };
}

macro_rules! map{
    // declear btreemap
    ($($key:expr => $val:expr),*) => {
        {
            let mut map = ::std::collections::BTreeMap::new();
            $(
                map.insert($key, $val);
            )*
            map
        }
    };
}

macro_rules! set{
    // declear btreemap
    ($($key:expr),*) => {
        {
            let mut set = ::std::collections::BTreeSet::new();
            $(
                set.insert($key);
            )*
            set
        }
    };
}

//input output
#[allow(dead_code)]
fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}

#[allow(dead_code)]
fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>()
        .split_whitespace()
        .map(|e| e.parse().ok().unwrap())
        .collect()
}

#[allow(dead_code)]
fn read_mat<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
    (0..n).map(|_| read_vec()).collect()
}

#[allow(dead_code)]
fn readii() -> (i64, i64) {
    let mut vec: Vec<i64> = read_vec();
    (vec[0], vec[1])
}

#[allow(dead_code)]
fn readiii() -> (i64, i64, i64) {
    let mut vec: Vec<i64> = read_vec();
    (vec[0], vec[1], vec[2])
}
#[allow(dead_code)]
fn readuu() -> (usize, usize) {
    let mut vec: Vec<usize> = read_vec();
    (vec[0], vec[1])
}

fn readuuu() -> (usize, usize, usize) {
    let mut vec: Vec<usize> = read_vec();
    (vec[0], vec[1], vec[2])
}

fn extgcd(a: i128, b: i128) -> (i128, i128, i128) {
    if b == 0 {
        (a.abs(), a.signum(), 0)
    } else {
        let (g, x, y) = extgcd(b, a % b);
        (g, y, x - (a / b) * y)
    }
}
fn modinv(a: i128, m: i128) -> i128 {
    let (g, x, _) = extgcd(a, m);
    let inv = x % m;
    if inv < 0 {
        inv + m
    } else {
        inv
    }
}
fn crt(r1: i128, m1: i128, r2: i128, m2: i128) -> (i128, i128) {
    let diff = r2 - r1;
    let inv = modinv(m1 % m2, m2);
    let k = (diff % m2 + m2) % m2 * inv % m2;
    let r = r1 + k * m1;
    let m = m1 * m2;
    let r = ((r % m) + m) % m;
    (r, m)
}
fn main() {
    let n = read::<usize>() as i128;
    let (p, q, r) = readuuu();
    let (a, b, c) = readuuu();

    let (p, q, r) = (p as i128, q as i128, r as i128);
    let (a, b, c) = (a as i128, b as i128, c as i128);

    let (x, m) = crt(a, p, b, q);
    let (x, m) = crt(x, m, c, r);

    // let x = x as u128;
    // let m = m as u128;

    let ans = if x > n { 0 } else { (n - x) / m + 1 };
    println!("{}", ans);
}
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