結果

問題 No.1750 ラムドスウイルスの感染拡大-hard
ユーザー Moss_Local
提出日時 2021-11-19 21:39:46
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 1,332 ms / 2,000 ms
コード長 8,881 bytes
コンパイル時間 14,582 ms
コンパイル使用メモリ 401,164 KB
実行使用メモリ 6,820 KB
最終ジャッジ日時 2024-12-31 22:12:40
合計ジャッジ時間 27,387 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 * 4
other AC * 30
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: unnecessary parentheses around type
  --> src/main.rs:68:15
   |
68 | fn readi() -> (i64) {
   |               ^   ^
   |
   = note: `#[warn(unused_parens)]` on by default
help: remove these parentheses
   |
68 - fn readi() -> (i64) {
68 + fn readi() -> i64 {
   |

warning: unused variable: `i`
   --> src/main.rs:304:9
    |
304 |     for i in 0..m {
    |         ^ help: if this is intentional, prefix it with an underscore: `_i`
    |
    = note: `#[warn(unused_variables)]` on by default

warning: unused variable: `w`
   --> src/main.rs:312:17
    |
312 |         for (u, w) in &graph[v] {
    |                 ^ help: if this is intentional, prefix it with an underscore: `_w`

warning: variable does not need to be mutable
   --> src/main.rs:305:14
    |
305 |         let (mut a, mut b) = readuu();
    |              ----^
    |              |
    |              help: remove this `mut`
    |
    = note: `#[warn(unused_mut)]` on by default

warning: variable does not need to be mutable
   --> src/main.rs:305:21
    |
305 |         let (mut a, mut b) = readuu();
    |                     ----^
    |                     |
    |                     help: remove this `mut`

warning: variable does not need to be mutable
   --> src/main.rs:316:9
    |
316 |     let mut m = Matrix { v: vv };
    |         ----^
    |         |
    |         help: remove this `mut`

warning: variable `K` should have a snake case name
   --> src/main.rs:198:17
    |
198 |             let K = self.n();
    |                 ^ help: convert the identifier to snake case (notice the capitalization): `k`
    |
    = note: `#[warn(non_snake_case)]` on by default

warning: variable `M` should have a snake case name
   --> src/main.rs:199:17
    |
199 |             let M = self.m();
    |                 ^ help: convert the identifier to snake case: `m`

warning: variable `N` should have a snake case name
   --> src/main.rs:200:17
    |
200 |             let N = other.n();
    |             

ソースコード

diff #
プレゼンテーションモードにする

// -*- coding:utf-8-unix -*-
// #![feature(map_first_last)]
#![allow(dead_code)]
#![allow(unused_imports)]
#![allow(unused_macros)]
use std::cmp::Ordering::*;
use std::collections::*;
use std::convert::*;
use std::convert::{From, Into};
use std::error::Error;
use std::f64::consts::PI;
use std::fmt::Debug;
use std::fmt::Display;
use std::fs::File;
use std::hash::Hash;
use std::io::prelude::*;
use std::io::*;
use std::marker::Copy;
use std::mem::*;
use std::ops::Bound::*;
use std::ops::RangeBounds;
use std::ops::{Add, Mul, Neg, Sub};
use std::slice::from_raw_parts;
use std::str;
use std::vec;
const INF: i64 = 1223372036854775807;
const UINF: usize = INF as usize;
// const FINF: f64 = 122337203685.0;
const LINF: i64 = 2147483647;
const FINF: f64 = LINF as f64;
const INF128: i128 = 1223372036854775807000000000000;
// const MOD: i64 = 1000000007;
const MOD: i64 = 998244353;
const MPI: f64 = 3.14159265358979323846264338327950288f64;
// const MOD: i64 = INF;
const UMOD: usize = MOD as usize;
use std::cmp::*;
use std::collections::*;
use std::io::stdin;
use std::io::stdout;
use std::io::Write;
macro_rules! p {
($x:expr) => {
println!("{}", $x);
};
}
macro_rules! d {
($x:expr) => {
println!("{:?}", $x);
};
}
// use str::Chars;
// use str::Chars;
#[allow(dead_code)]
fn read<T: std::str::FromStr>() -> T {
let mut s = String::new();
std::io::stdin().read_line(&mut s).ok();
s.trim().parse().ok().unwrap()
}
#[allow(dead_code)]
fn readi() -> (i64) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
iter.next().unwrap().parse::<i64>().unwrap()
}
#[allow(dead_code)]
fn read_vec<T: std::str::FromStr>() -> Vec<T> {
read::<String>()
.split_whitespace()
.map(|e| e.parse().ok().unwrap())
.collect()
}
#[allow(dead_code)]
fn read_mat<T: std::str::FromStr>(n: u32) -> Vec<Vec<T>> {
(0..n).map(|_| read_vec()).collect()
}
#[allow(dead_code)]
fn readii() -> (i64, i64) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<i64>().unwrap(),
iter.next().unwrap().parse::<i64>().unwrap(),
)
}
fn readff() -> (f64, f64) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<f64>().unwrap(),
iter.next().unwrap().parse::<f64>().unwrap(),
)
}
#[allow(dead_code)]
fn readiii() -> (i64, i64, i64) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<i64>().unwrap(),
iter.next().unwrap().parse::<i64>().unwrap(),
iter.next().unwrap().parse::<i64>().unwrap(),
)
}
#[allow(dead_code)]
fn readuu() -> (usize, usize) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
)
}
fn readcc() -> (char, char) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<char>().unwrap(),
iter.next().unwrap().parse::<char>().unwrap(),
)
}
#[allow(dead_code)]
fn readuuu() -> (usize, usize, usize) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
)
}
#[allow(dead_code)]
fn readuuuu() -> (usize, usize, usize, usize) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
iter.next().unwrap().parse::<usize>().unwrap(),
)
}
fn readiiii() -> (i64, i64, i64, i64) {
let mut str = String::new();
let _ = stdin().read_line(&mut str).unwrap();
let mut iter = str.split_whitespace();
(
iter.next().unwrap().parse::<i64>().unwrap(),
iter.next().unwrap().parse::<i64>().unwrap(),
iter.next().unwrap().parse::<i64>().unwrap(),
iter.next().unwrap().parse::<i64>().unwrap(),
)
}
pub mod matrix {
#[derive(Clone)]
pub struct Matrix {
pub v: Vec<Vec<i64>>,
}
impl Matrix {
pub fn identity(n: usize) -> Self {
let mut v = vec![vec![0; n]; n];
for i in 0..n {
v[i][i] = 1;
}
Matrix { v: v }
}
pub fn m(&self) -> usize {
self.v.len()
}
pub fn n(&self) -> usize {
self.v[0].len()
}
pub fn mul_rem(&self, other: &Self, mo: i64) -> Self {
assert!(self.n() == other.m());
let K = self.n();
let M = self.m();
let N = other.n();
let mut r = vec![vec![0; N]; M];
for i in 0..M {
for j in 0..N {
let mut v = 0;
for k in 0..K {
v += self.v[i][k] * other.v[k][j] % mo;
v %= mo;
}
r[i][j] = v;
}
}
Matrix { v: r }
}
pub fn pow(&self, k: u64, mo: i64) -> Self {
assert!(self.m() == self.n());
let mut k = k;
let mut x = Self::identity(self.m());
let mut y = self.clone();
while k > 0 {
if k & 1 > 0 {
x = y.mul_rem(&x, mo);
x %= mo;
}
y = y.mul_rem(&y, mo);
y %= mo;
k >>= 1;
}
x
}
}
use std::ops::*;
impl Add for Matrix {
type Output = Self;
fn add(self, other: Self) -> Self {
let mut r = self.v.clone();
for i in 0..self.m() {
for j in 0..self.n() {
r[i][j] += other.v[i][j];
}
}
Matrix { v: r }
}
}
impl Sub for Matrix {
type Output = Self;
fn sub(self, other: Self) -> Self {
let mut r = self.v.clone();
for i in 0..self.m() {
for j in 0..self.n() {
r[i][j] -= other.v[i][j];
}
}
Matrix { v: r }
}
}
impl Mul for Matrix {
type Output = Self;
fn mul(self, other: Self) -> Self {
assert!(self.n() == other.m());
let K = self.n();
let M = self.m();
let N = other.n();
let mut r = vec![vec![0; N]; M];
for i in 0..M {
for j in 0..N {
let mut v = 0;
for k in 0..K {
v += self.v[i][k] * other.v[k][j];
}
r[i][j] = v;
}
}
Matrix { v: r }
}
}
impl Rem<i64> for Matrix {
type Output = Self;
fn rem(self, mo: i64) -> Self {
let mut r = self.v.clone();
for i in 0..self.m() {
for j in 0..self.n() {
r[i][j] %= mo;
}
}
Matrix { v: r }
}
}
impl RemAssign<i64> for Matrix {
fn rem_assign(&mut self, mo: i64) {
for i in 0..self.m() {
for j in 0..self.n() {
self.v[i][j] %= mo;
}
}
}
}
}
pub type Matrix = matrix::Matrix;
fn solve() {
let (n, m, t) = readuuu();
let mut graph = vec![vec![(0 as usize, 0 as usize); (0) as usize]; (n) as usize];
for i in 0..m {
let (mut a, mut b) = readuu();
graph[a].push((b, 1));
graph[b].push((a, 1));
}
let mut vv = vec![vec![0 as i64; (n) as usize]; (n) as usize];
for v in 0..n {
for (u, w) in &graph[v] {
vv[v][*u] += 1;
}
}
let mut m = Matrix { v: vv };
let m = m.pow(t as u64, MOD);
let mut a = vec![vec![0 as i64; (1) as usize]; (n) as usize];
a[0][0] = 1;
let aa = Matrix { v: a };
// println!("{:?}", m.v.clone());
let p = m * aa;
println!("{:?}", p.v[0][0]);
return;
}
fn main() {
solve();
}
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