結果
| 問題 |
No.978 Fibonacci Convolution Easy
|
| ユーザー |
|
| 提出日時 | 2020-04-01 16:02:48 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 30 ms / 2,000 ms |
| コード長 | 3,251 bytes |
| コンパイル時間 | 13,770 ms |
| コンパイル使用メモリ | 379,300 KB |
| 実行使用メモリ | 17,576 KB |
| 最終ジャッジ日時 | 2024-06-26 22:44:58 |
| 合計ジャッジ時間 | 15,028 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 21 |
ソースコード
#[doc = " https://github.com/hatoo/competitive-rust-snippets"]
#[allow(unused_imports)]
use std::cmp::{max, min, Ordering};
#[allow(unused_imports)]
use std::collections::{BTreeMap, BTreeSet, BinaryHeap, HashMap, HashSet, VecDeque};
#[allow(unused_imports)]
use std::io::{stdin, stdout, BufWriter, Write};
#[allow(unused_imports)]
use std::iter::FromIterator;
mod util {
use std::fmt::Debug;
use std::io::{stdin, stdout, BufWriter, StdoutLock};
use std::str::FromStr;
#[allow(dead_code)]
pub fn line() -> String {
let mut line: String = String::new();
stdin().read_line(&mut line).unwrap();
line.trim().to_string()
}
#[allow(dead_code)]
pub fn chars() -> Vec<char> {
line().chars().collect()
}
#[allow(dead_code)]
pub fn gets<T: FromStr>() -> Vec<T>
where
<T as FromStr>::Err: Debug,
{
let mut line: String = String::new();
stdin().read_line(&mut line).unwrap();
line.split_whitespace()
.map(|t| t.parse().unwrap())
.collect()
}
#[allow(dead_code)]
pub fn with_bufwriter<F: FnOnce(BufWriter<StdoutLock>) -> ()>(f: F) {
let out = stdout();
let writer = BufWriter::new(out.lock());
f(writer)
}
}
#[allow(unused_macros)]
macro_rules ! get { ( [ $ t : ty ] ) => { { let mut line : String = String :: new ( ) ; stdin ( ) . read_line ( & mut line ) . unwrap ( ) ; line . split_whitespace ( ) . map ( | t | t . parse ::<$ t > ( ) . unwrap ( ) ) . collect ::< Vec < _ >> ( ) } } ; ( [ $ t : ty ] ; $ n : expr ) => { ( 0 ..$ n ) . map ( | _ | get ! ( [ $ t ] ) ) . collect ::< Vec < _ >> ( ) } ; ( $ t : ty ) => { { let mut line : String = String :: new ( ) ; stdin ( ) . read_line ( & mut line ) . unwrap ( ) ; line . trim ( ) . parse ::<$ t > ( ) . unwrap ( ) } } ; ( $ ( $ t : ty ) ,* ) => { { let mut line : String = String :: new ( ) ; stdin ( ) . read_line ( & mut line ) . unwrap ( ) ; let mut iter = line . split_whitespace ( ) ; ( $ ( iter . next ( ) . unwrap ( ) . parse ::<$ t > ( ) . unwrap ( ) , ) * ) } } ; ( $ t : ty ; $ n : expr ) => { ( 0 ..$ n ) . map ( | _ | get ! ( $ t ) ) . collect ::< Vec < _ >> ( ) } ; ( $ ( $ t : ty ) ,*; $ n : expr ) => { ( 0 ..$ n ) . map ( | _ | get ! ( $ ( $ t ) ,* ) ) . collect ::< Vec < _ >> ( ) } ; }
#[allow(unused_macros)]
macro_rules ! debug { ( $ ( $ a : expr ) ,* ) => { eprintln ! ( concat ! ( $ ( stringify ! ( $ a ) , " = {:?}, " ) ,* ) , $ ( $ a ) ,* ) ; } }
const BIG_STACK_SIZE: bool = true;
#[allow(dead_code)]
fn main() {
use std::thread;
if BIG_STACK_SIZE {
thread::Builder::new()
.stack_size(32 * 1024 * 1024)
.name("solve".into())
.spawn(solve)
.unwrap()
.join()
.unwrap();
} else {
solve();
}
}
#[allow(dead_code)]
pub const M: u64 = 1_000_000_007;
fn solve() {
let (n, p) = get!(usize, u64);
let mut fib = vec![0, 1];
while fib.len() < n {
fib.push((p * fib[fib.len() - 1] + fib[fib.len() - 2]) % M);
}
let mut t = 0;
let mut ans = 0;
for a in &fib[..n] {
t += a;
t %= M;
ans += a * t % M;
ans %= M;
}
println!("{}", ans);
}