結果

問題 No.493 とても長い数列と文字列(Long Long Sequence and a String)
ユーザー koba-e964koba-e964
提出日時 2021-10-28 22:04:59
言語 Rust
(1.83.0 + proconio)
結果
TLE  
実行時間 -
コード長 2,523 bytes
コンパイル時間 12,167 ms
コンパイル使用メモリ 405,120 KB
実行使用メモリ 15,424 KB
最終ジャッジ日時 2024-10-07 08:10:01
合計ジャッジ時間 16,719 ms
ジャッジサーバーID
(参考情報)
judge1 / judge2
このコードへのチャレンジ
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ファイルパターン 結果
sample TLE * 1 -- * 3
other -- * 115
権限があれば一括ダウンロードができます
コンパイルメッセージ
warning: variable does not need to be mutable
  --> src/main.rs:47:13
   |
47 |         let mut v = k as i64 * k as i64;
   |             ----^
   |             |
   |             help: remove this `mut`
   |
   = note: `#[warn(unused_mut)]` on by default

ソースコード

diff #
プレゼンテーションモードにする

#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
use std::io::Read;
#[allow(dead_code)]
fn getline() -> String {
let mut ret = String::new();
std::io::stdin().read_line(&mut ret).ok().unwrap();
ret
}
fn get_word() -> String {
let stdin = std::io::stdin();
let mut stdin=stdin.lock();
let mut u8b: [u8; 1] = [0];
loop {
let mut buf: Vec<u8> = Vec::with_capacity(16);
loop {
let res = stdin.read(&mut u8b);
if res.unwrap_or(0) == 0 || u8b[0] <= b' ' {
break;
} else {
buf.push(u8b[0]);
}
}
if buf.len() >= 1 {
let ret = String::from_utf8(buf).unwrap();
return ret;
}
}
}
#[allow(dead_code)]
fn get<T: std::str::FromStr>() -> T { get_word().parse().ok().unwrap() }
const MOD: i64 = 1_000_000_007;
fn dfs(k: usize, l: i64, r: i64, len: &[i64]) -> (i64, i64) {
if k == 1 {
return (if l < r { 1 } else { 0 }, 1);
}
if (l, r) == (0, len[k]) {
let mut a = 0;
let mut b = 1;
let mut v = k as i64 * k as i64;
while v > 0 {
let mut r = v % 10;
a += r;
if r == 0 { r = 10; }
b = b * r % MOD;
}
let (c, d) = dfs(k - 1, 0, len[k - 1], len);
a += 2 * c;
b = b * d % MOD * d % MOD;
return (a, b);
}
let mut a = 0;
let mut b = 1;
let mid1 = len[k - 1];
let mid2 = len[k] - len[k - 1];
if l < mid1 {
let (c, d) = dfs(k - 1, l, min(r, mid1), &len);
a += c;
b = b * d % MOD;
}
if l < mid2 && r < mid1 {
let s: Vec<_> = format!("{}", k * k).bytes().collect();
for i in max(l, mid1) - mid1..min(r, mid2) - mid1 {
let v = s[i as usize] as i64;
a += r;
let v = if v == 0 { 10 } else { v };
b = b % v % MOD;
}
}
if r > mid2 {
let (c, d) = dfs(k - 1, max(l, mid2) - mid2, r - mid2, &len);
a += c;
b = b * d % MOD;
}
(a, b)
}
fn main() {
let k: usize = get();
let l: i64 = get();
let r: i64 = get();
let mut len = vec![0; 62];
len[1] = 1;
for i in 2..62 {
len[i] = len[i - 1] * 2 + format!("{}", i * i).len() as i64;
}
let k = min(k, 61);
if r > len[k] {
println!("-1");
return;
}
let (a, b) = dfs(k, l - 1, r, &len);
println!("{} {}", a, b);
}
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