結果

問題 No.1073 無限すごろく
ユーザー ziitaziita
提出日時 2020-06-05 22:27:19
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 4 ms / 2,000 ms
コード長 5,190 bytes
コンパイル時間 14,495 ms
コンパイル使用メモリ 387,280 KB
実行使用メモリ 6,820 KB
最終ジャッジ日時 2024-12-17 16:10:37
合計ジャッジ時間 14,649 ms
ジャッジサーバーID
(参考情報)
judge1 / judge5
このコードへのチャレンジ
(要ログイン)
ファイルパターン 結果
sample AC * 3
other AC * 30
権限があれば一括ダウンロードができます

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)]
#![allow(non_snake_case, unused)]
use std::cmp::*;
use std::collections::*;
use std::ops::*;
// https://atcoder.jp/contests/hokudai-hitachi2019-1/submissions/10518254
macro_rules! eprint {
($($t:tt)*) => {{
use ::std::io::Write;
let _ = write!(::std::io::stderr(), $($t)*);
}};
}
macro_rules! eprintln {
() => { eprintln!(""); };
($($t:tt)*) => {{
use ::std::io::Write;
let _ = writeln!(::std::io::stderr(), $($t)*);
}};
}
macro_rules! dbg {
($v:expr) => {{
let val = $v;
eprintln!("[{}:{}] {} = {:?}", file!(), line!(), stringify!($v), val);
val
}}
}
macro_rules! mat {
($($e:expr),*) => { Vec::from(vec![$($e),*]) };
($($e:expr,)*) => { Vec::from(vec![$($e),*]) };
($e:expr; $d:expr) => { Vec::from(vec![$e; $d]) };
($e:expr; $d:expr $(; $ds:expr)+) => { Vec::from(vec![mat![$e $(; $ds)*]; $d]) };
}
macro_rules! ok {
($a:ident$([$i:expr])*.$f:ident()$(@$t:ident)*) => {
$a$([$i])*.$f($($t),*)
};
($a:ident$([$i:expr])*.$f:ident($e:expr$(,$es:expr)*)$(@$t:ident)*) => { {
let t = $e;
ok!($a$([$i])*.$f($($es),*)$(@$t)*@t)
} };
}
pub fn readln() -> String {
let mut line = String::new();
::std::io::stdin().read_line(&mut line).unwrap_or_else(|e| panic!("{}", e));
line
}
macro_rules! read {
($($t:tt),*; $n:expr) => {{
let stdin = ::std::io::stdin();
let ret = ::std::io::BufRead::lines(stdin.lock()).take($n).map(|line| {
let line = line.unwrap();
let mut it = line.split_whitespace();
_read!(it; $($t),*)
}).collect::<Vec<_>>();
ret
}};
($($t:tt),*) => {{
let line = readln();
let mut it = line.split_whitespace();
_read!(it; $($t),*)
}};
}
macro_rules! _read {
($it:ident; [char]) => {
_read!($it; String).chars().collect::<Vec<_>>()
};
($it:ident; [u8]) => {
Vec::from(_read!($it; String).into_bytes())
};
($it:ident; usize1) => {
$it.next().unwrap_or_else(|| panic!("input mismatch")).parse::<usize>().unwrap_or_else(|e| panic!("{}", e)) - 1
};
($it:ident; [usize1]) => {
$it.map(|s| s.parse::<usize>().unwrap_or_else(|e| panic!("{}", e)) - 1).collect::<Vec<_>>()
};
($it:ident; [$t:ty]) => {
$it.map(|s| s.parse::<$t>().unwrap_or_else(|e| panic!("{}", e))).collect::<Vec<_>>()
};
($it:ident; $t:ty) => {
$it.next().unwrap_or_else(|| panic!("input mismatch")).parse::<$t>().unwrap_or_else(|e| panic!("{}", e))
};
($it:ident; $($t:tt),+) => {
($(_read!($it; $t)),*)
};
}
pub fn main() {
let _ = ::std::thread::Builder::new().name("run".to_string()).stack_size(32 * 1024 * 1024).spawn(run).unwrap().join();
}
const MOD: u32 = 1_000_000_007;
const INF: i64 = std::i64::MAX/3;
#[derive(Clone, Copy)]
struct ModInt(u32);
impl std::ops::Add for ModInt {
type Output = ModInt;
fn add(self, rhs: ModInt) -> Self::Output {
let mut d = self.0 + rhs.0;
if d >= MOD {
d -= MOD;
}
ModInt(d)
}
}
impl std::ops::AddAssign for ModInt {
fn add_assign(&mut self, rhs: ModInt) {
*self = *self + rhs;
}
}
impl std::ops::Sub for ModInt {
type Output = ModInt;
fn sub(self, rhs: ModInt) -> Self::Output {
let mut d = self.0 + MOD - rhs.0;
if d >= MOD {
d -= MOD;
}
ModInt(d)
}
}
impl std::ops::SubAssign for ModInt {
fn sub_assign(&mut self, rhs: ModInt) {
*self = *self - rhs;
}
}
impl std::ops::Mul for ModInt {
type Output = ModInt;
fn mul(self, rhs: ModInt) -> Self::Output {
ModInt((self.0 as u64 * rhs.0 as u64 % MOD as u64) as u32)
}
}
impl std::ops::MulAssign for ModInt {
fn mul_assign(&mut self, rhs: ModInt) {
*self = *self * rhs;
}
}
impl std::ops::Neg for ModInt {
type Output = ModInt;
fn neg(self) -> Self::Output {
ModInt(if self.0 == 0 {0} else {MOD - self.0})
}
}
/*
impl std::fmt::Display for ModInt {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.0)
}
}
*/
#[allow(dead_code)]
impl ModInt {
pub fn new(n: u32) -> ModInt {
ModInt(n % MOD)
}
pub fn zero() -> ModInt {
ModInt(0)
}
pub fn one() -> ModInt {
ModInt(1)
}
pub fn pow(self, mut n: u32) -> ModInt {
let mut t = ModInt::one();
let mut s = self;
while n > 0 {
if n & 1 == 1 {
t *= s;
}
s *= s;
n >>= 1;
}
t
}
pub fn inv(self) -> ModInt {
self.pow(MOD - 2)
}
}
fn solve() {
let n = read!(i64);
let mut map: HashMap<i64,ModInt> = HashMap::new();
map.insert(0,ModInt(1));
let ans = dfs(n,&mut map);
println!("{}",ans.0);
}
fn dfs(val: i64, mut map: &mut HashMap<i64,ModInt>) -> ModInt {
if map.contains_key(&val) {
return *map.get(&val).unwrap();
}
let half = val/2;
let base = max(0,half-5);
let mut sum = ModInt(0);
for i in 0..6 {
let s = base + i;
let ma = min(val-1,base+5);
for j in 1..7 {
let s2 = s + j;
if s2 <= ma {
continue;
}
let t = val - s2;
if t<0 {
continue;
}
sum += dfs(s,&mut map)*dfs(t,&mut map)*ModInt(6).inv();
}
}
map.insert(val,sum);
sum
}
fn run() {
solve();
}
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