結果
| 問題 |
No.8030 ミラー・ラビン素数判定法のテスト
|
| ユーザー |
uw_yu1rabbit
|
| 提出日時 | 2021-09-11 19:17:29 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,006 bytes |
| コンパイル時間 | 14,271 ms |
| コンパイル使用メモリ | 378,964 KB |
| 実行使用メモリ | 5,376 KB |
| 最終ジャッジ日時 | 2024-06-23 03:42:37 |
| 合計ジャッジ時間 | 15,617 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 4 WA * 6 |
コンパイルメッセージ
warning: value assigned to `t` is never read --> src/main.rs:91:17 | 91 | let mut t = 0; | ^ | = help: maybe it is overwritten before being read? = note: `#[warn(unused_assignments)]` on by default warning: constant `INF` is never used --> src/main.rs:84:7 | 84 | const INF:i64 = 1i64 << 60; | ^^^ | = note: `#[warn(dead_code)]` on by default
ソースコード
#[allow(dead_code)]
fn solve(read: &mut snio::Reader<std::io::StdinLock<'_>>) {
let n = read.i64();
for _ in 0..n {
let f = read.i128();
println!("{} {}",f, if miller_rabin(f,100) {1} else {0});
}
}
//use proconio::input;
fn main() {
let t = std::io::stdin();
let mut read = snio::Reader::new(t.lock());
let n = 1;
for _ in 0..n {
solve(&mut read);
}
}
#[allow(dead_code)]
pub mod snio {
pub struct Reader<R: std::io::BufRead> {
reader: R,
buf: std::collections::VecDeque<String>,
}
impl<R: std::io::BufRead> Reader<R> {
pub fn new(reader: R) -> Self {
Self {
reader,
buf: std::collections::VecDeque::new(),
}
}
fn load(&mut self) {
while self.buf.is_empty() {
let mut s = String::new();
let length = self.reader.read_line(&mut s).unwrap();
if length == 0 {
break;
}
self.buf.extend(s.split_whitespace().map(|s| s.to_owned()));
}
}
pub fn string(&mut self) -> String {
self.load();
self.buf.pop_front().unwrap_or_else(|| panic!("input ended"))
}
pub fn char(&mut self) -> char {
let string = self.string();
let mut chars = string.chars();
let res = chars.next().unwrap();
assert!(chars.next().is_none(), "invalid input!");
res
}
pub fn chars(&mut self) -> Vec<char> {
self.read::<String>().chars().collect()
}
pub fn read<T: std::str::FromStr>(&mut self) -> T
where
<T as ::std::str::FromStr>::Err: ::std::fmt::Debug,
{
self.string().parse::<T>().expect("Failed to parse the input.")
}
}
macro_rules! definition_of_reader_of_numbers {
($($ty:tt,)*) => {
impl <R:std::io::BufRead> Reader<R> {
$(
#[inline]
pub fn $ty (&mut self) -> $ty {
self.read::<$ty>()
}
)*
}
}
}
definition_of_reader_of_numbers! {
u8,u16,u32,u64,usize,
i8,i16,i32,i64,isize,i128,
f32,f64,
}
}
const INF:i64 = 1i64 << 60;
static mut XORSHIFT1:i128 = 123456789;
static mut XORSHIFT2:i128 = 362436069;
static mut XORSHIFT3:i128 = 521288629;
static mut XORSHIFT4:i128 = 88675123;
fn xorshift() -> i128 {
unsafe {
let mut t = 0;
t = XORSHIFT1^(XORSHIFT1 << 11i128);
XORSHIFT1 = XORSHIFT2;
XORSHIFT2 = XORSHIFT3;
XORSHIFT3 = XORSHIFT4;
XORSHIFT4 = (XORSHIFT4 ^ (XORSHIFT4 >> 19i128)) ^ (t ^ (t >> 8i128));
t
}
}
fn witness(n: i128, a: i128) -> bool {
let mut t = 0;
let mut u = n - 1;
while u & 1i128 == 0 {
t += 1;
u >>= 1;
}
let mut x:i128 = modpow(a, u, n);
for _ in 0..t {
let b = x * x % n;
if b == 1 {
if b != 1 && b != n - 1 {
return true;
} else {
return false;
}
}
x = b;
}
true
}
fn miller_rabin(n: i128, times: i64) -> bool {
if n == 1 {
return false;
}
if n % 2 == 0 {
return n == 2;
}
for _ in 0..times {
//let mut a = rand::thread_rng().gen_range(1,n);
let mut a = xorshift() % n;
while a == 0 {
a = xorshift() % n;
}
if witness(n, a) {
return false;
}
}
true
}
fn modpow(_x: i128, _n: i128, modulo: i128) -> i128 {
let mut x = _x;
x %= modulo;
let mut n = _n;
n %= modulo;
if n == 0 {
return 0;
}
let mut res = modpow((x + x) % modulo, n >> 1,modulo);
if n % 2 != 0 {
res = (res + x) % modulo;
}
res
}
uw_yu1rabbit