結果

問題 No.3040 Aoiスコア
コンテスト
ユーザー iomir
提出日時 2025-02-28 21:56:10
言語 C++23
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 95 ms / 1,000 ms
コード長 3,368 bytes
コンパイル時間 2,902 ms
コンパイル使用メモリ 284,260 KB
実行使用メモリ 7,844 KB
最終ジャッジ日時 2025-06-20 20:57:29
合計ジャッジ時間 4,020 ms
ジャッジサーバーID
（参考情報） 		judge2 / 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 # 

#include<bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;

#define all(v) v.begin(),v.end()
using ll = long long;
using ull = unsigned long long;
using lll = __int128;
using vll=vector<ll>;
using vvll = vector<vector<ll>>;
using P = pair<ll,ll>;
using vp=vector<pair<ll, ll>>;
//using mint=modint1000000007;
//using mint=modint998244353;

const ll INF=1ll<<60;
ll mod10=1e9+7;
ll mod99=998244353;
const double PI = acos(-1);

#define rep(i,n) for (ll i=0;i<n;++i)
#define per(i,n) for(ll i=n-1;i>=0;--i)
#define rep2(i,a,n) for (ll i=a;i<n;++i)
#define per2(i,a,n) for (ll i=a;i>=n;--i)

template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return true; } return false; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return true; } return false; }

template <long long MOD>
struct modint {
	long long value;
	modint(long long x = 0) {
		if (x >= 0) {
			value = x % MOD;
		} else {
			value = MOD - (-x) % MOD;
		}
	}
	modint operator-() const {
		return modint(-value);
	}
	modint operator+() const {
		return modint(*this);
	}
	modint &operator+=(const modint &other) {
		value += other.value;
		if (value >= MOD) {
			value -= MOD;
		}
		return *this;
	}
	modint &operator-=(const modint &other) {
		value += MOD - other.value;
		if (value >= MOD) {
			value -= MOD;
		}
		return *this;
	}
	modint &operator*=(const modint other) {
		value = value * other.value % MOD;
		return *this;
	}
	modint &operator/=(modint other) {
		(*this) *= other.inv();
		return *this;
	}
	modint operator+(const modint &other) const {
		return modint(*this) += other;
	}
	modint operator-(const modint &other) const {
		return modint(*this) -= other;
	}
	modint operator*(const modint &other) const {
		return modint(*this) *= other;
	}
	modint operator/(const modint &other) const {
		return modint(*this) /= other;
	}
	modint pow(long long x) const {
		modint ret(1), mul(value);
		while (x > 0) {
			if (x % 2 == 1) {
				ret *= mul;
			}
			mul *= mul;
			x /= 2;
		}
		return ret;
	}
	modint inv() const {
		return pow(MOD - 2);
	}
	bool operator==(const modint &other) const {
		return value == other.value;
	}
	bool operator!=(const modint &other) const {
		return value != other.value;
	}
	friend std::ostream &operator<<(std::ostream &os, const modint &x) {
		return os << x.value;
	}
	friend std::istream &operator>>(std::istream &is, modint &x) {
		long long v;
		is >> v;
		x = modint<MOD>(v);
		return is;
	}
};

using mint = modint<998244353>;
using mod107 = modint<1000000007>;


ll powmod(ll x,ll n,ll m){
	ll res=1;
	while(n>0){
		if(n&1) res*=x;
		x*=x;
		res%=m;
		x%=m;
		n>>=1;
	}
	return res;
}


bool solve(){
	ll N,M;cin>>N>>M;
	string S;cin>>S;
	vvll ab(N);
	rep(i,M){
		ll a,b;cin>>a>>b;
		a--;b--;
		ab[a].push_back(b);
		ab[b].push_back(a);
	}
	ll cnt=0;rep(i,N) cnt+=S[i]=='?';
	mint ans=0;
	vector<mint> p(N+2);rep(i,N) p[i]=powmod(26,i,mod99);
	rep(i,N){
		if(S[i]!='o'&&S[i]!='?') continue;
		rep(j,ab[i].size()) rep(k,ab[i].size()){
			if(j==k) continue;
			if((S[ab[i][j]]=='?'||S[ab[i][j]]=='a')&&(S[i]=='?'||S[i]=='o')&&(S[ab[i][k]]=='?'||S[ab[i][k]]=='i')){
				ans+=p[cnt-(S[ab[i][j]]=='?')-(S[i]=='?')-(S[ab[i][k]]=='?')];
			}
		}
	}
	cout << ans << endl;
	return 0;
}




int main(){
   cin.tie(0);
   ios::sync_with_stdio(false);
   ll T=1;//cin>>T;
   rep(i,T) solve();
}
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