結果
| 問題 |
No.1164 GCD Products hard
|
| ユーザー |
cotton_fn_
|
| 提出日時 | 2020-08-26 14:21:53 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 179 ms / 2,500 ms |
| コード長 | 5,406 bytes |
| コンパイル時間 | 13,502 ms |
| コンパイル使用メモリ | 378,504 KB |
| 実行使用メモリ | 7,680 KB |
| 最終ジャッジ日時 | 2024-11-07 07:55:31 |
| 合計ジャッジ時間 | 17,408 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 27 |
ソースコード
#![allow(unused_imports, unused_macros)]
use kyoproio::*;
use std::{
collections::*,
io::{self, prelude::*},
iter,
mem::{replace, swap},
};
fn main() -> io::Result<()> {
std::thread::Builder::new()
.stack_size(64 * 1024 * 1024)
.spawn(|| {
let stdin = io::stdin();
let stdout = io::stdout();
run(KInput::new(stdin.lock()), io::BufWriter::new(stdout.lock()))
})?
.join()
.unwrap()
}
fn run<I: Input, O: Write>(mut kin: I, mut out: O) -> io::Result<()> {
macro_rules! output { ($($args:expr),+) => { write!(&mut out, $($args),+)?; }; }
macro_rules! outputln {
($($args:expr),+) => { output!($($args),+); outputln!(); };
() => { output!("\n"); if cfg!(debug_assertions) { out.flush()?; } }
}
const P: i64 = 1e9 as i64 + 7;
let (a, b, n): (i64, i64, i64) = kin.input();
let ps = primes(b as usize);
let mut s = 1;
for p in ps {
let p = p as i64;
let mut q = p;
while q <= b {
let c = b / q - (a - 1) / q;
s = s * mod_pow(p, mod_pow(c, n, P - 1), P) % P;
q *= p;
}
}
let ans = s;
outputln!("{}", ans);
Ok(())
}
pub fn primes(n: usize) -> Vec<usize> {
// 1, 7, 11, 13, 17, 19, 23, 29
const SKIP: [u8; 8] = [6, 4, 2, 4, 2, 4, 6, 2];
const XTOI: [u8; 15] = [
0, 0, 0, 1, 0, 2, 3, 0, 4, 5, 0, 6, 0, 0, 7,
];
let mut sieve = vec![0u8; n / 30 + 1];
let mut ps = vec![2, 3, 5];
if n <= 4 {
ps.truncate([0, 0, 1, 2, 2][n]);
return ps;
}
let mut x = 7;
let mut i = 1;
while x <= n {
if sieve[i / 8] & 1 << i % 8 == 0 {
ps.push(x);
let mut j = i;
let mut y = x * x;
while y <= n {
sieve[y / 30] |= 1 << XTOI[y / 2 % 15];
y += x * SKIP[j % 8] as usize;
j += 1;
}
}
x += SKIP[i % 8] as usize;
i += 1;
}
ps
}
pub fn mod_pow(mut a: i64, mut b: i64, m: i64) -> i64 {
let mut y = 1;
while b > 0 {
if b & 1 == 1 {
y = y * a % m;
}
a = a * a % m;
b >>= 1;
}
y
}
// -----------------------------------------------------------------------------
pub mod kyoproio {
use std::io::prelude::*;
pub trait Input {
fn str(&mut self) -> &str;
fn input<T: InputParse>(&mut self) -> T {
T::input(self)
}
fn iter<T: InputParse>(&mut self) -> Iter<T, Self> {
Iter(self, std::marker::PhantomData)
}
fn seq<T: InputParse, B: std::iter::FromIterator<T>>(&mut self, n: usize) -> B {
self.iter().take(n).collect()
}
}
pub struct KInput<R> {
src: R,
buf: String,
pos: usize,
}
impl<R: BufRead> KInput<R> {
pub fn new(src: R) -> Self {
Self {
src,
buf: String::with_capacity(1024),
pos: 0,
}
}
}
impl<R: BufRead> Input for KInput<R> {
fn str(&mut self) -> &str {
loop {
if self.pos >= self.buf.len() {
self.pos = 0;
self.buf.clear();
if self.src.read_line(&mut self.buf).expect("io error") == 0 {
return &self.buf;
}
}
let range = self.pos
..self.buf[self.pos..]
.find(|c: char| c.is_ascii_whitespace())
.map(|i| i + self.pos)
.unwrap_or_else(|| self.buf.len());
self.pos = range.end + 1;
if range.end > range.start {
return &self.buf[range];
}
}
}
}
pub struct Iter<'a, T, I: ?Sized>(&'a mut I, std::marker::PhantomData<*const T>);
impl<'a, T: InputParse, I: Input + ?Sized> Iterator for Iter<'a, T, I> {
type Item = T;
fn next(&mut self) -> Option<T> {
Some(self.0.input())
}
}
pub trait InputParse: Sized {
fn input<I: Input + ?Sized>(src: &mut I) -> Self;
}
impl InputParse for Vec<u8> {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
src.str().as_bytes().to_owned()
}
}
macro_rules! from_str_impl {
{ $($T:ty)* } => {
$(impl InputParse for $T {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
src.str().parse::<$T>().expect("parse error")
}
})*
}
}
from_str_impl! {
String char bool f32 f64 isize i8 i16 i32 i64 i128 usize u8 u16 u32 u64 u128
}
macro_rules! tuple_impl {
($H:ident $($T:ident)*) => {
impl<$H: InputParse, $($T: InputParse),*> InputParse for ($H, $($T),*) {
fn input<I: Input + ?Sized>(src: &mut I) -> Self {
($H::input(src), $($T::input(src)),*)
}
}
tuple_impl!($($T)*);
};
() => {}
}
tuple_impl!(A B C D E F G);
#[macro_export]
macro_rules! kdbg {
($($v:expr),*) => {
if cfg!(debug_assertions) { dbg!($($v),*) } else { ($($v),*) }
}
}
}
cotton_fn_