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;
}
Nachia