結果

問題 No.1464 Number Conversion
ユーザー RheoTommy
提出日時 2021-04-02 22:35:26
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 1 ms / 2,000 ms
コード長 6,424 bytes
コンパイル時間 13,562 ms
コンパイル使用メモリ 374,652 KB
実行使用メモリ 5,248 KB
最終ジャッジ日時 2024-12-23 20:16:04
合計ジャッジ時間 12,802 ms
ジャッジサーバーID
(参考情報)
judge3 / judge4
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ファイルパターン 結果
other AC * 29
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ソースコード

diff #
プレゼンテーションモードにする

#![allow(unused_macros)]
#![allow(dead_code)]
#![allow(unused_imports)]
// #
// - use
// - lib
// - main
// - basic
//
// 使 basic
// 使 lib
// → https://github.com/RheoTommy/at_coder
// Twitter → https://twitter.com/RheoTommy
use std::collections::*;
use std::io::{stdout, BufWriter, Write};
use crate::basic::*;
use crate::lib::*;
pub mod lib {
/// O(logN)
pub fn pow(mut x: i64, mut n: u64) -> i64 {
let mut res = 1;
while n != 0 {
if n & 1 == 1 {
res *= x;
}
n /= 2;
x *= x;
}
res
}
/// O(logN)
pub fn mod_pow(mut x: i64, mut n: u64, m: i64) -> i64 {
let mut res = 1;
while n != 0 {
if n & 1 == 1 {
res *= x;
}
n /= 2;
x *= x;
res %= m;
x %= m;
}
res % m
}
/// O(logN)
pub fn gcd(mut a: u64, mut b: u64) -> u64 {
while b != 0 {
let tmp = b;
b = a % b;
a = tmp;
}
a
}
/// O(logN)
pub fn lcm(a: u64, b: u64) -> u64 {
let g = gcd(a, b);
a * b / g
}
/// O(logN)
pub fn ext_gcd(a: i64, b: i64) -> (i64, i64, i64) {
if b == 0 {
return if a < 0 { (-a, -1, 0) } else { (a, 1, 0) };
}
let (g, s, t) = ext_gcd(b, a % b);
return (g, t, s - (a / b) * t);
}
pub fn mod_inv(a: i64, m: i64) -> Option<i64> {
let (g, xi, _) = ext_gcd(a, -m);
if g != 1 {
None
} else {
Some((xi % m + m) % m)
}
}
pub fn mod_div(a: i64, b: i64, n: i64) -> Option<i64> {
let d = gcd(gcd(a.abs() as u64, b.abs() as u64), n.abs() as u64) as i64;
let inv = mod_inv(a / d, n / d)?;
let n = n / d;
Some(((inv * b / d) % n + n) % n)
}
/// O(√NlogN)
pub fn divisors(n: u64) -> Vec<u64> {
let mut res = Vec::new();
for i in 1.. {
if i * i > n {
break;
}
if n % i == 0 {
res.push(i);
if n / i != i {
res.push(n / i);
}
}
}
res.sort();
res
}
/// O(√N)
pub fn is_prime(n: u64) -> bool {
for i in 2.. {
if i * i > n {
break;
}
if n % i == 0 {
return false;
}
}
n > 1 && true
}
/// O(√N)
pub fn factorization(mut n: u64) -> std::collections::HashMap<u64, u64> {
let mut res = std::collections::HashMap::new();
for i in 2.. {
if i * i > n {
break;
}
let mut ex = 0;
while n % i == 0 {
ex += 1;
n /= i;
}
if ex != 0 {
res.insert(i, ex);
}
}
if n != 0 {
*res.entry(n).or_insert(0) += 1;
}
res
}
pub fn float_to_int(s: &[char], x: u32) -> i64 {
if !s.contains(&'.') {
return s.iter().collect::<String>().parse::<i64>().unwrap() * 10i64.pow(x);
}
let n = s.len();
let i = s
.iter()
.enumerate()
.filter(|(_, ci)| **ci == '.')
.next()
.unwrap()
.0;
let l = n - i - 1;
let t = s
.iter()
.skip_while(|ci| **ci == '0')
.filter(|ci| **ci != '.')
.collect::<String>()
.parse::<i64>()
.unwrap()
* 10i64.pow(x - l as u32);
t
}
}
fn main() {
let mut sc = Scanner::new();
let x = sc.next_string();
let x = float_to_int(&x.chars().collect::<Vec<_>>(), 8);
let g = gcd(x as u64, 100000000) as i64;
println!("{}/{}", x / g, 100000000 / g);
}
pub mod basic {
pub const U_INF: u64 = (1 << 60) + (1 << 30);
pub const I_INF: i64 = (1 << 60) + (1 << 30);
pub struct Scanner {
buf: std::collections::VecDeque<String>,
reader: std::io::BufReader<std::io::Stdin>,
}
impl Scanner {
pub fn new() -> Self {
Self {
buf: std::collections::VecDeque::new(),
reader: std::io::BufReader::new(std::io::stdin()),
}
}
fn scan_line(&mut self) {
use std::io::BufRead;
let mut flag = 0;
while self.buf.is_empty() {
let mut s = String::new();
self.reader.read_line(&mut s).unwrap();
let mut iter = s.split_whitespace().peekable();
if iter.peek().is_none() {
if flag >= 5 {
panic!("There is no input!");
}
flag += 1;
continue;
}
for si in iter {
self.buf.push_back(si.to_string());
}
}
}
pub fn next<T: std::str::FromStr>(&mut self) -> T {
self.scan_line();
self.buf
.pop_front()
.unwrap()
.parse()
.unwrap_or_else(|_| panic!("Couldn't parse!"))
}
pub fn next_usize(&mut self) -> usize {
self.next()
}
pub fn next_int(&mut self) -> i64 {
self.next()
}
pub fn next_uint(&mut self) -> u64 {
self.next()
}
pub fn next_chars(&mut self) -> Vec<char> {
self.next::<String>().chars().collect()
}
pub fn next_string(&mut self) -> String {
self.next()
}
pub fn next_char(&mut self) -> char {
self.next()
}
pub fn next_float(&mut self) -> f64 {
self.next()
}
pub fn next_vec<T: std::str::FromStr>(&mut self, n: usize) -> Vec<T> {
(0..n).map(|_| self.next()).collect::<Vec<_>>()
}
}
}
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