結果

問題 No.3040 Aoiスコア
コンテスト
ユーザー 👑 ArcAki
提出日時 2025-02-28 22:08:37
言語 Rust
(1.83.0 + proconio)
結果
AC  
実行時間 141 ms / 1,000 ms
コード長 3,504 bytes
コンパイル時間 15,151 ms
コンパイル使用メモリ 396,300 KB
実行使用メモリ 7,844 KB
最終ジャッジ日時 2025-06-20 20:58:18
合計ジャッジ時間 12,423 ms
ジャッジサーバーID
（参考情報） 		judge3 / judge4
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 AC * 3
other AC * 26
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 # 

#[allow(unused_imports)]
use std::{
    cell::RefCell, convert::{Infallible, TryFrom, TryInto as _},
    fmt::{self, Debug, Display, Formatter,},
    fs::{File},
    hash::{Hash, Hasher},
    iter::{Product, Sum},
    marker::PhantomData,
    ops::{Add, AddAssign, Sub, SubAssign, Div, DivAssign, Mul, MulAssign, Neg, },
    str::FromStr,
    sync::{atomic::{self, AtomicU32, AtomicU64}, Once},
    collections::{*},
    mem::{swap},
    cmp::{self, Reverse, Ordering, Eq, PartialEq, PartialOrd},
    thread::LocalKey,
    f64::consts::PI,
    time::Instant,
    io::{self, stdin, Read, read_to_string, BufWriter, BufReader, stdout, Write},
};
#[allow(unused_imports)]
use proconio::{input, input_interactive, marker::{*}};
#[allow(unused_imports)]
//use rand::{thread_rng, Rng, seq::SliceRandom};
#[allow(unused_imports)]
//use ac_library::{*};

#[allow(dead_code)]
const INF: i64 = 1<<60;
#[allow(dead_code)]
const MOD: i64 = 998244353;
#[allow(dead_code)]
const D: [(usize, usize); 4] = [(1, 0), (0, 1), (!0, 0), (0, !0)];

pub fn floor(a:i64, b:i64)->i64{let res=(a%b+b)%b;(a-res)/b}
pub fn extended_gcd(a:i64,b:i64)->(i64,i64,i64)
{if b==0{(a,1,0)}else{let(g,x,y)=extended_gcd(b,a%b);(g,y,x-floor(a,b)*y)}}
pub fn mod_inverse(a:i64,m:i64)->i64{let(_,x,_) =extended_gcd(a,m);(x%m+m)%m}
pub fn comb(a: i64, b: i64, f: &Vec<(i64, i64)>)->i64{
    if a<b{return 0;}if b==0 || a==b{ return 1; }
    else{let x=f[a as usize].0;
        let y=f[(a-b) as usize].1;let z=f[b as usize].1;return((x*y)%MOD)*z%MOD;}}
pub fn factorial(x: i64)->Vec<(i64, i64)>{
    let mut f=vec![(1i64,1i64),(1, 1)];let mut z = 1i64;
    let mut inv = vec![0; x as usize+10];inv[1] = 1;
    for i in 2..x+1{z=(z*i)%MOD;
        let w=(MOD-inv[(MOD%i)as usize]*(MOD/i)%MOD)%MOD;
        inv[i as usize] = w;
        f.push((z, (f[i as usize-1].1*w)%MOD));}return f;}
pub fn fast_mod_pow(x: i64,p: usize, m: i64)->i64{
    let mut res=1;let mut t=x;let mut z=p;while z > 0{
        if z%2==1{res = (res*t)%m;}t = (t*t)%m;z /= 2; }res}

//use proconio::fastout;
//#[fastout]
fn main(){
    input!{
        n: usize, m: usize,
        s: Chars,
        e: [(Usize1, Usize1); m],
    }
    let mut cnt = 0;
    for &c in &s{
        if c=='?'{
            cnt += 1;
        }
    }
    let mut num = vec![fast_mod_pow(26, cnt, MOD)];
    if cnt >= 1{
        num.push(fast_mod_pow(26, cnt-1, MOD));
    }
    if cnt >= 2{
        num.push(fast_mod_pow(26, cnt-2, MOD));
    }
    if cnt >= 3{
        num.push(fast_mod_pow(26, cnt-3, MOD));
    }
    let mut edge = vec![Vec::new(); n];
    for &(u, v) in &e{
        edge[u].push(v);
        edge[v].push(u);
    }
    let mut ans = 0;
    for i in 0..n{
        if s[i]=='?'{
            dfs(i, !0, 1, &num, &edge, &s, &mut ans);
        } else if s[i]=='a'{
            dfs(i, !0, 0, &num, &edge, &s, &mut ans);
        }
    }
    println!("{}", ans);
}

fn dfs(p: usize, pre: usize, cnt: usize, num: &Vec<i64>, edge: &Vec<Vec<usize>>, s: &Vec<char>, ans: &mut i64){
    if pre > edge.len(){
        for &nex in &edge[p]{
            if s[nex]=='?'{
                dfs(nex, p, cnt+1, num, edge, s, ans);
            } else if s[nex]=='o'{
                dfs(nex, p, cnt, num, edge, s, ans);
            }
        }
    } else {
        for &nex in &edge[p]{
            if nex==pre{continue}
            if s[nex]=='?'{
                *ans = (*ans+num[cnt+1])%MOD;
            } else if s[nex]=='i'{
                *ans = (*ans+num[cnt])%MOD;
            }
        }
    }
}
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