結果
| 問題 |
No.260 世界のなんとか3
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2017-01-12 01:08:44 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 233 ms / 2,000 ms |
| コード長 | 2,920 bytes |
| コンパイル時間 | 19,575 ms |
| コンパイル使用メモリ | 386,804 KB |
| 実行使用メモリ | 16,640 KB |
| 最終ジャッジ日時 | 2024-12-21 09:59:41 |
| 合計ジャッジ時間 | 18,977 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 27 |
ソースコード
#[allow(unused_imports)]
use std::cmp::*;
#[allow(unused_imports)]
use std::collections::*;
use std::io::*;
#[allow(dead_code)]
fn getline() -> String {
let mut ret = String::new();
std::io::stdin().read_line(&mut ret).ok();
return ret;
}
fn get_word() -> String {
let mut stdin = std::io::stdin();
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.is_err() || res.ok().unwrap() == 0 || u8b[0] <= ' ' as u8 {
break;
} else {
buf.push(u8b[0]);
}
}
if buf.len() >= 1 {
let ret = std::string::String::from_utf8(buf).unwrap();
return ret;
}
}
}
fn parse<T: std::str::FromStr>(s: &str) -> T { s.parse::<T>().ok().unwrap() }
#[allow(dead_code)]
fn get<T: std::str::FromStr>() -> T { parse(&get_word()) }
const MOD: i64 = 1_000_000_007;
// http://kmjp.hatenablog.jp/entry/2015/08/03/0930
fn solve(a: Vec<i64>) -> i64 {
let n = a.len();
let mut dp = vec![vec![vec![vec![vec![0_i64; 8]; 3]; 2]; 2]; n + 1];
dp[0][0][0][0][0] = 1;
for i in 0 .. n {
for more in 0 .. 2 {
for i3 in 0 .. 2 {
for m3 in 0 .. 3 {
for m8 in 0 .. 8 {
for x in 0 .. 10 {
if more == 0 && x > a[i] as usize { continue; }
let delta = dp[i][more][i3][m3][m8];
let ret = &mut dp[i + 1]
[more | (if x < a[i] as usize { 1 } else { 0 })]
[i3 | (if x == 3 { 1 } else { 0 })]
[(m3 * 10 + x) % 3]
[(m8 * 10 + x) % 8];
*ret += delta;
*ret %= MOD;
}
}
}
}
}
}
let mut tot: i64 = 0;
for more in 0 .. 2 {
for i3 in 0 .. 2 {
for m3 in 0 .. 3 {
for m8 in 0 .. 8 {
if (i3 == 1 || m3 == 0) && m8 != 0 {
tot = (tot + dp[n][more][i3][m3][m8]) % MOD;
}
}
}
}
}
tot
}
fn dec(mut a: Vec<i64>) -> Vec<i64> {
let n = a.len();
for i in (0 .. n).rev() {
match a[i] {
0 => a[i] = 9,
_ => {
a[i] -= 1;
return a;
}
}
}
panic!();
}
fn main() {
let a: Vec<i64> = get_word().chars()
.map(|c| (c as u8 - 48) as i64).collect();
let b: Vec<i64> = get_word().chars()
.map(|c| (c as u8 - 48) as i64).collect();
let ares = solve(dec(a));
let bres = solve(b);
println!("{}", (bres - ares + MOD) % MOD);
}