結果
| 問題 | No.2584 The University of Tree | 
| コンテスト | |
| ユーザー |  Nachia | 
| 提出日時 | 2023-11-22 03:54:22 | 
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) | 
| 結果 | 
                                AC
                                 
                             | 
| 実行時間 | 249 ms / 3,000 ms | 
| コード長 | 3,364 bytes | 
| コンパイル時間 | 968 ms | 
| コンパイル使用メモリ | 89,856 KB | 
| 最終ジャッジ日時 | 2025-02-17 22:50:37 | 
| ジャッジサーバーID (参考情報) | judge2 / judge1 | 
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| ファイルパターン | 結果 | 
|---|---|
| other | AC * 53 | 
ソースコード
#include <iostream>
#include <vector>
#include <algorithm>
#include <utility>
#include <cassert>
#include <atcoder/modint>
using namespace std;
using Modint = atcoder::modint998244353;
struct MidData{
    int root;
    Modint reach;
    Modint pass;
};
//   -     -
//  |       |
//   -x->-y-
MidData rake(MidData x, MidData y){
    MidData res;
    res.root = x.root;
    res.pass = x.pass * y.pass;
    res.reach = x.pass * y.reach + x.reach;
    return res;
}
MidData compress(MidData x, int newRoot){
    MidData res;
    res.root = newRoot + 1;
    res.pass = Modint(newRoot + 1);
    res.reach = Modint(newRoot + 1) * x.reach;
    return res;
}
MidData newTree(int newRoot, bool base){
    MidData res;
    if(base){
        res.root = 1;
        res.pass = Modint(0);
        res.reach = Modint(1);
    } else {
        res.root = newRoot + 1;
        res.pass = Modint(1);
        res.reach = Modint(0);
    }
    return res;
}
int main(){
    ios::sync_with_stdio(false); cin.tie(nullptr);
    int N; cin >> N;
    vector<vector<int>> edges(N*2);
    vector<int> xoredges(N-1);
    for(int i=0; i<N; i++){
        edges[i].push_back(i+N);
        edges[i+N].push_back(i);
    }
    for(int i=0; i<N; i++){
        int c; cin >> c;
        for(int j=0; j<c; j++){
            int e; cin >> e; e--;
            xoredges[e] ^= i;
            edges[i].push_back(e);
        }
    }
    for(int i=0; i<N; i++){
        for(int j=1; j<(int)edges[i].size(); j++){
            edges[i][j] = i ^ xoredges[edges[i][j]];
        }
    }
    vector<int> parent(N*2, -1);
    vector<int> bfs = {0};
    for(int i=0; i<N*2; i++){
        int v = bfs[i];
        if(i != 0){
            int q = 0;
            while(edges[v][q] != parent[v]) q++;
            if(q != (int)edges[v].size() - 1){
                rotate(edges[v].begin(), edges[v].begin() + q + 1, edges[v].end());
            }
        }
        for(int w : edges[v]) if(parent[v] != w){
            parent[w] = v;
            bfs.push_back(w);
        }
    }
    vector<MidData> low(N*2);
    for(int i=N*2-1; i>=0; i--){
        int v = bfs[i];
        low[v] = newTree(v, v>=N);
        int c = edges[v].size();
        if(i != 0) c--;
        for(int j=0; j<c; j++){
            int w = edges[v][j];
            low[v] = rake(low[v], compress(low[w], v));
        }
    }
    vector<MidData> high(N*2);
    for(int i=0; i<N*2; i++){
        int v = bfs[i];
        int c = edges[v].size();
        if(i != 0) c--;
        if(c == 0) continue;
        vector<MidData> highL(c);
        vector<MidData> highR(c);
        highL[0] = newTree(v, v>=N);
        if(i != 0){
            int w = parent[v];
            highL[0] = rake(highL[0], compress(high[v], v));
        }
        for(int t=0; t<c-1; t++){
            int w = edges[v][t];
            highL[t+1] = rake(highL[t], compress(low[w], v));
        }
        highR[c-1] = newTree(v, v>=N);
        for(int t=c-1; t>=1; t--){
            int w = edges[v][t];
            highR[t-1] = rake(compress(low[w], v), highR[t]);
        }
        for(int t=0; t<c; t++){
            int w = edges[v][t];
            high[w] = rake(highR[t], highL[t]);
        }
    }
    
    vector<Modint> ans(N);
    for(int i=0; i<N; i++) ans[i] = high[N+i].reach;
    for(int i=0; i<N; i++){
        cout << ans[i].val() << '\n';
    }
    return 0;
}
            
            
            
        