Submission #909489

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
909489	2024-01-17 08:26:24	IBory	Long Mansion (JOI17_long_mansion)	C++17	100 / 100	431 ms	75992 KiB

long_mansion

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#include <bits/stdc++.h>
#define pii pair<int, int>
using namespace std;
const int MAX = 500005;
int C[MAX], L[MAX], R[MAX];
pii E[MAX];
vector<int> K[MAX];
int main() {
  ios::sync_with_stdio(0); cin.tie(0);
  int N, Q;
  cin >> N;
  for (int i = 1; i < N; ++i) cin >> C[i];
  for (int i = 1; i <= N; ++i) {
    int M;
    cin >> M;
    K[i].resize(M);
    for (int& n : K[i]) cin >> n;
  }
  vector<int> in(N + 1);
  for (int i = 1; i < N; ++i) {
    for (int k : K[i]) in[k] = i;
    L[i] = in[C[i]];
  }
  fill(in.begin(), in.end(), N + 1);
  for (int i = N - 1; i > 0; --i) {
    for (int k : K[i + 1]) in[k] = i + 1;
    R[i] = in[C[i]];
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 15 / 15
• Subtask 4: 75 / 75