結果
問題 | No.1287 えぬけー |
ユーザー | akakimidori |
提出日時 | 2020-11-13 21:38:21 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 90 ms / 2,000 ms |
コード長 | 3,325 bytes |
コンパイル時間 | 13,551 ms |
コンパイル使用メモリ | 380,916 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-07-22 20:33:23 |
合計ジャッジ時間 | 14,642 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 1 ms
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 1 ms
5,376 KB |
testcase_04 | AC | 1 ms
5,376 KB |
testcase_05 | AC | 86 ms
5,376 KB |
testcase_06 | AC | 87 ms
5,376 KB |
testcase_07 | AC | 90 ms
5,376 KB |
testcase_08 | AC | 82 ms
5,376 KB |
コンパイルメッセージ
warning: unused variable: `i` --> src/main.rs:55:13 | 55 | for i in 1..=c { | ^ help: if this is intentional, prefix it with an underscore: `_i` | = note: `#[warn(unused_variables)]` on by default warning: variable does not need to be mutable --> src/main.rs:49:12 | 49 | fn divisor(mut n: u64) -> Vec<u64> { | ----^ | | | help: remove this `mut` | = note: `#[warn(unused_mut)]` on by default warning: function `gcd` is never used --> src/main.rs:1:4 | 1 | fn gcd(mut a: u64, mut b: u64) -> u64 { | ^^^ | = note: `#[warn(dead_code)]` on by default warning: function `divisor` is never used --> src/main.rs:49:4 | 49 | fn divisor(mut n: u64) -> Vec<u64> { | ^^^^^^^ warning: function `is_prime` is never used --> src/main.rs:66:4 | 66 | fn is_prime(n: u64) -> bool { | ^^^^^^^^
ソースコード
fn gcd(mut a: u64, mut b: u64) -> u64 { while b > 0 { let r = a % b; a = b; b = r; } a } fn pow_mod(r: u64, mut n: u64, m: u32) -> u64 { assert!(m > 0); if m == 1 { return 0; } let m = m as u64; let mut t = 1; let mut s = r % m; while n > 0 { if n & 1 == 1 { t = t * s % m; } s = s * s % m; n >>= 1; } t } fn factorize(mut n: u64) -> Vec<(u64, u32)> { let mut res = vec![]; for k in 2.. { if k * k > n { break; } let mut c = 0; while n % k == 0 { n /= k; c += 1; } if c > 0 { res.push((k, c)); } } if n > 1 { res.push((n, 1)); } res } fn divisor(mut n: u64) -> Vec<u64> { let f = factorize(n); let mut res = vec![1]; for (p, c) in f { let len = res.len(); let mut mul = 1; for i in 1..=c { mul *= p; for j in 0..len { let v = res[j] * mul; res.push(v); } } } res } fn is_prime(n: u64) -> bool { (2u64..).take_while(|p| p * p <= n).all(|p| n % p != 0) } // ---------- begin input macro ---------- // reference: https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8 macro_rules! input { (source = $s:expr, $($r:tt)*) => { let mut iter = $s.split_whitespace(); input_inner!{iter, $($r)*} }; ($($r:tt)*) => { let s = { use std::io::Read; let mut s = String::new(); std::io::stdin().read_to_string(&mut s).unwrap(); s }; let mut iter = s.split_whitespace(); input_inner!{iter, $($r)*} }; } macro_rules! input_inner { ($iter:expr) => {}; ($iter:expr, ) => {}; ($iter:expr, $var:ident : $t:tt $($r:tt)*) => { let $var = read_value!($iter, $t); input_inner!{$iter $($r)*} }; } macro_rules! read_value { ($iter:expr, ( $($t:tt),* )) => { ( $(read_value!($iter, $t)),* ) }; ($iter:expr, [ $t:tt ; $len:expr ]) => { (0..$len).map(|_| read_value!($iter, $t)).collect::<Vec<_>>() }; ($iter:expr, chars) => { read_value!($iter, String).chars().collect::<Vec<char>>() }; ($iter:expr, bytes) => { read_value!($iter, String).bytes().collect::<Vec<u8>>() }; ($iter:expr, usize1) => { read_value!($iter, usize) - 1 }; ($iter:expr, $t:ty) => { $iter.next().unwrap().parse::<$t>().expect("Parse error") }; } // ---------- end input macro ---------- use std::io::Write; fn run() { let out = std::io::stdout(); let mut out = std::io::BufWriter::new(out.lock()); input! { t: usize, ask: [(u64, u64); t], } const MOD: u32 = 1_000_000_007; let f = factorize(MOD as u64); let phi = f.iter().fold(1, |s, &(p, a)| s * (p - 1) * p.pow(a - 1)); let fp = factorize(phi); let phi_p = fp.iter().fold(1, |s, &(p, a)| s * (p - 1) * p.pow(a - 1)); for (x, k) in ask { let ik = pow_mod(k, phi_p - 1, phi as u32); let ans = pow_mod(x, ik, MOD); assert!(pow_mod(ans, k, MOD) == x); writeln!(out, "{}", ans).ok(); } } fn main() { run(); }