結果

問題 No.2428 Returning Shuffle
ユーザー umimel
提出日時 2023-08-18 22:08:11
言語 C++14
(gcc 13.3.0 + boost 1.87.0)
結果
WA  
実行時間 -
コード長 5,174 bytes
コンパイル時間 1,782 ms
コンパイル使用メモリ 178,652 KB
実行使用メモリ 61,824 KB
最終ジャッジ日時 2024-11-28 07:23:39
合計ジャッジ時間 4,724 ms
ジャッジサーバーID
（参考情報） 		judge4 / judge3
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 * 18 WA * 5
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

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define drep(i, cc, n) for (ll i = (cc); i <= (n); ++i)
#define rep(i, n) drep(i, 0, n - 1)
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define fi first
#define se second
mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
const ll MOD1000000007 = 1000000007;
const ll MOD998244353 = 998244353;
const ll MOD[3] = {999727999, 1070777777, 1000000007};
const ll LINF = 1LL << 60;
const int IINF = (1 << 30) - 1;
template<typename T> struct Edge{
    int to; T w;
    Edge(int to_, T w_=1){
        to = to_;
        w=w_;
    }
};
template<typename T> using Tree = vector<vector<Edge<T>>>;
template<typename T> using Graph = vector<vector<Edge<T>>>;
/* 容量&重み付きエッジ for Dinic */
template<typename T> struct REdge{
    int to;
    T cap;
    T cost;
    int rev;
    REdge(int to_, T cap_, T cost_=1){
        to = to_;
        cap = cap_;
        cost = cost_;
    }
    
    REdge(int to_, T cap_, T cost_, int rev_){
        to = to_;
        cap = cap_;
        cost = cost_;
        rev = rev_;
    }
};
/* 残余グラフ for Dinic */
template<typename T> using RGraph = vector<vector<REdge<T>>>;
struct UnionFind{
    vector<ll> parent;
    vector<ll> sizes;
    
    UnionFind(ll N) : parent(N), sizes(N, 1){
        rep(i, N) parent[i] = i;
    }
    
    ll root(ll x){
        if (parent[x] == x) return x;
        return parent[x] = root(parent[x]);
    }
 
    void unite(ll x, ll y){
        ll rx = root(x);
        ll ry = root(y);
        if (rx == ry) return;
        if (sizes[rx] < sizes[ry]) swap(rx, ry);
        sizes[rx] += sizes[ry];
        parent[ry] = rx;
    }
 
    bool same(ll x, ll y){
        ll rx = root(x);
        ll ry = root(y);
        return rx == ry;
    }
 
    ll size(ll x){
        return sizes[root(x)];
    }
};
template<long long mod>
class modint{
    long long x;
public:
    modint(long long x=0) : x((x%mod+mod)%mod) {}
    modint operator-() const { 
      return modint(-x);
    }
    bool operator==(const modint& a){
        if(x == a) return true;
        else return false;
    }
    bool operator==(long long a){
        if(x == a) return true;
        else return false;
    }
    bool operator!=(const modint& a){
        if(x != a) return true;
        else return false;
    }
    bool operator!=(long long a){
        if(x != a) return true;
        else return false;
    }
    modint& operator+=(const modint& a) {
        if ((x += a.x) >= mod) x -= mod;
        return *this;
    }
    modint& operator-=(const modint& a) {
        if ((x += mod-a.x) >= mod) x -= mod;
        return *this;
    }
    modint& operator*=(const  modint& a) {
        (x *= a.x) %= mod;
        return *this;
    }
    modint operator+(const modint& a) const {
        modint res(*this);
        return res+=a;
    }
    modint operator-(const modint& a) const {
        modint res(*this);
        return res-=a;
    }
    modint operator*(const modint& a) const {
        modint res(*this);
        return res*=a;
    }
    modint pow(long long t) const {
        if (!t) return 1;
        modint a = pow(t>>1);
        a *= a;
        if (t&1) a *= *this;
        return a;
    }
    // for prime mod
    modint inv() const {
        return pow(mod-2);
    }
    modint& operator/=(const modint& a) {
        return (*this) *= a.inv();
    }
    modint operator/(const modint& a) const {
        modint res(*this);
        return res/=a;
    }
    friend std::istream& operator>>(std::istream& is, modint& m) noexcept {
        is >> m.x;
        m.x %= mod;
        if (m.x < 0) m.x += mod;
        return is;
    }
    friend ostream& operator<<(ostream& os, const modint& m){
        os << m.x;
        return os;
    }
};
using mint = modint<MOD998244353>;
int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    
    ll n, m; cin >> n >> m;
    vector<vector<ll>> s(m);
    rep(i, m){
        ll t; cin >> t;
        rep(j, t){
            ll tmp; cin >> tmp;
            tmp--;
            s[i].pb(tmp);
        }
    }
    vector<ll> p(n, 0); rep(i, n) p[i] = i;
    rep(i, m){
        ll t = (ll)s[i].size();
        ll tmp = p[s[i][t-1]];
        for(ll j=t-1; j>0; j--) p[s[i][j]] = p[s[i][j-1]];
        p[s[i][0]] = tmp;
    }
    UnionFind uf(n);
    rep(i, n) uf.unite(i, p[i]);
    vector<ll> cnt(n+1, -1);
    rep(i, n) if(uf.root(i)==i){
        ll c = uf.size(i);
        vector<pll> prime;
        ll sc = c;
        for(ll x=2; x*x<=c; x++){
            if(sc%x!=0) continue;
            ll cnt_x = 0;
            while(sc%x==0){
                cnt_x++;
                sc/=x;
            }
            prime.pb({x, cnt_x});
        }
        if(sc!=1) prime.pb({sc, 1});
        for(pll tmp : prime){
            if(cnt[tmp.fi]==-1){
                cnt[tmp.fi] = tmp.se;
            }else{
                cnt[tmp.fi] = min(cnt[tmp.fi], tmp.se);
            }
        }
    }
    mint ans = 1;
    for(ll i=1; i<=n; i++){
        if(cnt[i]!=-1){
            ans *= mint(i).pow(cnt[i]);
        }
    }
    cout << ans << endl;
}
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