結果
問題 | No.1006 Share an Integer |
ユーザー | fukafukatani |
提出日時 | 2020-03-06 21:49:52 |
言語 | Rust (1.83.0 + proconio) |
結果 |
TLE
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 2,140 bytes |
コンパイル時間 | 22,443 ms |
コンパイル使用メモリ | 400,316 KB |
実行使用メモリ | 17,628 KB |
最終ジャッジ日時 | 2024-10-14 06:16:51 |
合計ジャッジ時間 | 33,955 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 15 TLE * 4 |
コンパイルメッセージ
warning: function `read_vec` is never used --> src/main.rs:46:4 | 46 | fn read_vec<T: std::str::FromStr>() -> Vec<T> { | ^^^^^^^^ | = note: `#[warn(dead_code)]` on by default
ソースコード
#![allow(unused_imports)] #![allow(non_snake_case)] use std::cmp::*; use std::collections::*; use std::io::Write; #[allow(unused_macros)] macro_rules! debug { ($($e:expr),*) => { #[cfg(debug_assertions)] $({ let (e, mut err) = (stringify!($e), std::io::stderr()); writeln!(err, "{} = {:?}", e, $e).unwrap() })* }; } fn main() { let x = read::<i64>(); let mut count = vec![0; x as usize + 1]; count[1] = 1; let mut xx = 1; while xx * xx <= x { xx += 1; } let primes = get_primes(xx + 1); for i in 1..x { let fact = factorize(i, &primes); count[i as usize] = fact.values().fold(1, |x, &s| x * (1 + s)); } let f = |n: i64| n - count[n as usize]; let min_fab = (1..x).map(|i| (f(i) - f(x - i)).abs()).min().unwrap(); for i in 1..x { if (f(i) - f(x - i)).abs() == min_fab { println!("{} {}", i, x - i); } } } 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() } fn read_vec<T: std::str::FromStr>() -> Vec<T> { read::<String>() .split_whitespace() .map(|e| e.parse().ok().unwrap()) .collect() } fn get_primes(n: i64) -> Vec<i64> { let mut is_prime = vec![true; n as usize + 1]; let mut primes = Vec::new(); is_prime[0] = false; is_prime[1] = false; for i in 2..n + 1 { if is_prime[i as usize] { primes.push(i); let mut j = 2 * i; while j < n { is_prime[j as usize] = false; j += i; } } } primes } fn factorize(mut num: i64, primes: &Vec<i64>) -> std::collections::HashMap<i64, i64> { // max_primes >= (num)^(1/2) let mut dict = std::collections::HashMap::new(); for &p in primes.iter() { while num % p == 0 { *dict.entry(p).or_insert(0) += 1; num /= p; } if num == 1 { break; } } if num != 1 { dict.insert(num, 1); } dict }