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Submission #600835

# Submission time Handle Problem Language Result Execution time Memory
600835 2022-07-21T08:10:54 Z Mamedov Werewolf (IOI18_werewolf) C++17
100 / 100
 1084 ms 154864 KB 
#pragma GCC optimize ("O3")
#include "werewolf.h"
#include <bits/stdc++.h>
#define pii pair<int, int>
#define piii pair<pii, int>
#define vi vector<int>
#define vvi vector<vi>
#define vpii vector<pii>
#define vvpii vector<vpii>
#define f first
#define s second
#define oo 1000000001
#define eb emplace_back
#define pb push_back
#define mpr make_pair
#define size(v) (int)v.size()
#define ln '\n'
#define ull unsigned long long
#define ll long long
#define all(v) v.begin(), v.end()

using namespace std;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

struct DSU {
  int components;
  vector<int>par;
  DSU(int n) {
    par.assign(n, -1);
    components = n;
  }
  int Find(int u) {
    if (par[u] < 0) return u;
    else return par[u] = Find(par[u]);
  }
  bool Union(int u, int v) {
    u = Find(u);
    v = Find(v);
    if (u != v) {
      par[u] += par[v];
      par[v] = u;
      --components;
      return true;
    } else {
      return false;
    }
  }
};

void dfs1(int node, vvi &tree, int &tmr, vi &tin, vi &tout) {
  tin[node] = ++tmr;
  for (int to : tree[node]) {
    dfs1(to, tree, tmr, tin, tout);
  }
  tout[node] = tmr;
}

void dfs2(int node, vvi &tree, vi &tin, vi &tout, vvpii &group, vector<set<int>> &subTree, vi &res) {
  int maxChild = -1;
  for (int to : tree[node]) {
    dfs2(to, tree, tin, tout, group, subTree, res);
    if (maxChild == -1 || size(subTree[to]) > size(subTree[maxChild])) {
      maxChild = to;
    }
  }
  if (maxChild != -1) {
    swap(subTree[node], subTree[maxChild]);
    ///subTree[node] = subTree[maxChild];
    for (int to : tree[node]) {
      if (to != maxChild) {
        subTree[node].insert(all(subTree[to]));
      }
    }
  }
  subTree[node].insert(tin[node]);
  for (auto [v, i] : group[node]) {
    auto itr = subTree[node].lower_bound(tin[v]);
    if (itr != subTree[node].end() && (*itr) <= tout[v]) {
      res[i] = 1;
    }
  }
}

vi check_validity(int N, vi X, vi Y, vi S, vi E, vi L, vi R) {
  int M = size(X);
  vvi g(N);
  for (int i = 0; i < M; ++i) {
    g[X[i]].eb(Y[i]);
    g[Y[i]].eb(X[i]);
  }

  DSU dsu1(N), dsu2(N);
  vvi treeHuman(N), treeWolf(N);
  vector<vvi>up(2, vvi(19, vi(N)));

  up[0][0][0] = 0;
  for (int i = N - 1; i >= 0; --i) {
    for (int to : g[i]) {
      if (to > i && dsu1.Find(to) != i) {
        treeHuman[i].eb(dsu1.Find(to));
        up[0][0][dsu1.Find(to)] = i;
        dsu1.Union(i, to);
      }
    }
  }
  up[1][0][N - 1] = N - 1;
  for (int i = 0; i < N; ++i) {
    for (int to : g[i]) {
      if (to < i && dsu2.Find(to) != i) {
        treeWolf[i].eb(dsu2.Find(to));
        up[1][0][dsu2.Find(to)] = i;
        dsu2.Union(i, to);
      }
    }
  }
  for (int k = 0; k < 2; ++k) {
    for (int i = 1; i < 19; ++i) {
      for (int j = 0; j < N; ++j) {
        up[k][i][j] = up[k][i - 1][up[k][i - 1][j]];
      }
    }
  }
  int Q = size(S);
  vvpii group(N);
  for (int i = 0; i < Q; ++i) {
    for (int j = 18; j >= 0; --j) {
      if (up[0][j][S[i]] >= L[i]) {
        S[i] = up[0][j][S[i]];
      }
      if (up[1][j][E[i]] <= R[i]) {
        E[i] = up[1][j][E[i]];
      }
    }
    group[E[i]].eb(mpr(S[i], i));
  }

  int tmr = -1;
  vi tin(N), tout(N);
  dfs1(0, treeHuman, tmr, tin, tout);

  vi res(Q, 0);
  vector<set<int>>subTree(N);
  dfs2(N - 1, treeWolf, tin, tout, group, subTree, res);
  return res;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 9 ms 2024 KB Output is correct
11 Correct 6 ms 2004 KB Output is correct
12 Correct 6 ms 2132 KB Output is correct
13 Correct 6 ms 2260 KB Output is correct
14 Correct 6 ms 2260 KB Output is correct
15 Correct 6 ms 2132 KB Output is correct

Subtask #3
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 756 ms 148468 KB Output is correct
2 Correct 750 ms 122368 KB Output is correct
3 Correct 684 ms 120196 KB Output is correct
4 Correct 689 ms 125220 KB Output is correct
5 Correct 732 ms 126548 KB Output is correct
6 Correct 709 ms 133116 KB Output is correct
7 Correct 811 ms 154864 KB Output is correct
8 Correct 746 ms 122444 KB Output is correct
9 Correct 611 ms 120036 KB Output is correct
10 Correct 543 ms 124684 KB Output is correct
11 Correct 547 ms 126116 KB Output is correct
12 Correct 551 ms 133048 KB Output is correct
13 Correct 783 ms 129500 KB Output is correct
14 Correct 818 ms 129208 KB Output is correct
15 Correct 793 ms 129152 KB Output is correct
16 Correct 810 ms 129016 KB Output is correct
17 Correct 781 ms 153600 KB Output is correct

Subtask #4
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 9 ms 2024 KB Output is correct
11 Correct 6 ms 2004 KB Output is correct
12 Correct 6 ms 2132 KB Output is correct
13 Correct 6 ms 2260 KB Output is correct
14 Correct 6 ms 2260 KB Output is correct
15 Correct 6 ms 2132 KB Output is correct
16 Correct 756 ms 148468 KB Output is correct
17 Correct 750 ms 122368 KB Output is correct
18 Correct 684 ms 120196 KB Output is correct
19 Correct 689 ms 125220 KB Output is correct
20 Correct 732 ms 126548 KB Output is correct
21 Correct 709 ms 133116 KB Output is correct
22 Correct 811 ms 154864 KB Output is correct
23 Correct 746 ms 122444 KB Output is correct
24 Correct 611 ms 120036 KB Output is correct
25 Correct 543 ms 124684 KB Output is correct
26 Correct 547 ms 126116 KB Output is correct
27 Correct 551 ms 133048 KB Output is correct
28 Correct 783 ms 129500 KB Output is correct
29 Correct 818 ms 129208 KB Output is correct
30 Correct 793 ms 129152 KB Output is correct
31 Correct 810 ms 129016 KB Output is correct
32 Correct 781 ms 153600 KB Output is correct
33 Correct 815 ms 123568 KB Output is correct
34 Correct 304 ms 27656 KB Output is correct
35 Correct 851 ms 123008 KB Output is correct
36 Correct 711 ms 127376 KB Output is correct
37 Correct 966 ms 121912 KB Output is correct
38 Correct 936 ms 124976 KB Output is correct
39 Correct 1028 ms 136432 KB Output is correct
40 Correct 949 ms 126208 KB Output is correct
41 Correct 772 ms 120200 KB Output is correct
42 Correct 771 ms 125068 KB Output is correct
43 Correct 1084 ms 127852 KB Output is correct
44 Correct 807 ms 120964 KB Output is correct
45 Correct 755 ms 137264 KB Output is correct
46 Correct 872 ms 136920 KB Output is correct
47 Correct 906 ms 128216 KB Output is correct
48 Correct 823 ms 128072 KB Output is correct
49 Correct 926 ms 128168 KB Output is correct
50 Correct 796 ms 128124 KB Output is correct
51 Correct 735 ms 125484 KB Output is correct
52 Correct 828 ms 125456 KB Output is correct