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Submission #895613

# Submission time Handle Problem Language Result Execution time Memory
895613 2023-12-30T11:39:47 Z vjudge1 Tax Evasion (LMIO19_mokesciai) C++17
100 / 100
 307 ms 145852 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long

const int N = 1e6+6, inf = LLONG_MAX;

int n, m, sz, ans, dol[N], dol2[N], up[N], dep[N];
vector<int> path, adj[N];
bitset<N> vis;
set<pair<int, int>> st[N];

void dfs3(int x, int idx, int d) {
  if (vis[x]) return;
  vis[x] = 1;

  auto it = st[idx].find(make_pair(-dep[x], x));
  if (it != st[idx].end()) st[idx].erase(it);

  for (int& y : adj[x]) {
    if (y == up[x]) continue;
    dfs3(y, idx, d+1);
  }
}

void dfs2(int x) {
  st[x].insert(make_pair(-dep[x], x));

  for (int& y : adj[x]) {
    if (y == up[x]) continue;

    dfs2(y);
    if (st[y].size() > st[x].size()) swap(st[x], st[y]);
    
    for (pair<int, int> p : st[y]) {
      st[x].insert(p);
    }
    st[y].clear();
  }

  //assert(dol2[x] <= st[x].size());
  while (dol2[x] > 0) {
    //cerr << x << " " << dol2[x] << endl;
    dol2[x]--;
    
    auto it = st[x].begin();
    int d = it->first;
    int y = it->second;
    st[x].erase(it);

    ans = min(ans, -d);
    st[x].insert(make_pair(d+1, up[y]));
    dfs3(y, x, 0);
  }
}

void dfs(int x, int u, int d) {
  up[x] = u;
  dep[x] = d;

  path.push_back(x);
  if (dol[x] && x) {
    dol[x]--;

    int sz = path.size();
    dol2[path[sz - sz/2]]++;
  }

  for (int& y : adj[x]) {
    if (y == u) continue;
    dfs(y, x, d+1);
  }

  path.pop_back();
}

signed main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);

  sz = 0;
  ans = inf;
  memset(dol, 0, sizeof(dol));
  memset(dol2, 0, sizeof(dol2));

  cin >> n >> m;
  for (int i = 1; i < n; i++) {
    int x;
    cin >> x;
    x--;
    adj[x].push_back(i);
    adj[i].push_back(x);
  }

  bool ok = 1;
  for (int i = 0; i < m; i++) {
    int x;
    cin >> x;
    x--;
    dol[x]++;

    if (!x) ok = 0;
  }
  if (n == 1 || !ok) {
    cout << "1\n";
    return 0;
  }

  dfs(0, 0, 1);
  dfs2(0);

  cout << ans << "\n";
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 91988 KB Output is correct
2 Correct 18 ms 91996 KB Output is correct
3 Correct 20 ms 93344 KB Output is correct
4 Correct 21 ms 93276 KB Output is correct
5 Correct 20 ms 93276 KB Output is correct
6 Correct 114 ms 145572 KB Output is correct
7 Correct 128 ms 145768 KB Output is correct
8 Correct 20 ms 93256 KB Output is correct
9 Correct 137 ms 145656 KB Output is correct
10 Correct 146 ms 145600 KB Output is correct
11 Correct 130 ms 145852 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 114 ms 145572 KB Output is correct
2 Correct 128 ms 145768 KB Output is correct
3 Correct 20 ms 93256 KB Output is correct
4 Correct 17 ms 92164 KB Output is correct
5 Correct 21 ms 93016 KB Output is correct
6 Correct 19 ms 93020 KB Output is correct
7 Correct 20 ms 92504 KB Output is correct
8 Correct 19 ms 92656 KB Output is correct
9 Correct 23 ms 92508 KB Output is correct
10 Correct 110 ms 131524 KB Output is correct
11 Correct 110 ms 131520 KB Output is correct
12 Correct 188 ms 114008 KB Output is correct
13 Correct 125 ms 129984 KB Output is correct
14 Correct 192 ms 118788 KB Output is correct
15 Correct 181 ms 114144 KB Output is correct
16 Correct 100 ms 130100 KB Output is correct
17 Correct 307 ms 115236 KB Output is correct
18 Correct 126 ms 137440 KB Output is correct
19 Correct 124 ms 115524 KB Output is correct
20 Correct 113 ms 113416 KB Output is correct
21 Correct 109 ms 113160 KB Output is correct
22 Correct 109 ms 113408 KB Output is correct
23 Correct 110 ms 113092 KB Output is correct
24 Correct 117 ms 112724 KB Output is correct

Subtask #3
39.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 91988 KB Output is correct
2 Correct 18 ms 91996 KB Output is correct
3 Correct 20 ms 93344 KB Output is correct
4 Correct 21 ms 93276 KB Output is correct
5 Correct 20 ms 93276 KB Output is correct
6 Correct 17 ms 92164 KB Output is correct
7 Correct 21 ms 93016 KB Output is correct
8 Correct 19 ms 93020 KB Output is correct
9 Correct 20 ms 92504 KB Output is correct
10 Correct 19 ms 92656 KB Output is correct
11 Correct 23 ms 92508 KB Output is correct
12 Correct 20 ms 93256 KB Output is correct
13 Correct 19 ms 91996 KB Output is correct
14 Correct 17 ms 92072 KB Output is correct
15 Correct 18 ms 91840 KB Output is correct
16 Correct 20 ms 91992 KB Output is correct
17 Correct 18 ms 91996 KB Output is correct
18 Correct 23 ms 93024 KB Output is correct
19 Correct 19 ms 92760 KB Output is correct
20 Correct 20 ms 92764 KB Output is correct
21 Correct 25 ms 92364 KB Output is correct
22 Correct 23 ms 92508 KB Output is correct
23 Correct 20 ms 92860 KB Output is correct
24 Correct 20 ms 92252 KB Output is correct
25 Correct 23 ms 92764 KB Output is correct
26 Correct 24 ms 92508 KB Output is correct
27 Correct 22 ms 92888 KB Output is correct
28 Correct 20 ms 92992 KB Output is correct
29 Correct 20 ms 92508 KB Output is correct
30 Correct 22 ms 92760 KB Output is correct
31 Correct 20 ms 92356 KB Output is correct
32 Correct 20 ms 92752 KB Output is correct
33 Correct 19 ms 92508 KB Output is correct

Subtask #4
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 19 ms 91996 KB Output is correct
2 Correct 17 ms 92072 KB Output is correct
3 Correct 18 ms 91840 KB Output is correct
4 Correct 20 ms 91992 KB Output is correct
5 Correct 18 ms 91996 KB Output is correct
6 Correct 23 ms 93024 KB Output is correct
7 Correct 19 ms 92760 KB Output is correct
8 Correct 20 ms 92764 KB Output is correct
9 Correct 25 ms 92364 KB Output is correct
10 Correct 23 ms 92508 KB Output is correct
11 Correct 20 ms 92860 KB Output is correct
12 Correct 20 ms 92252 KB Output is correct
13 Correct 23 ms 92764 KB Output is correct
14 Correct 24 ms 92508 KB Output is correct
15 Correct 22 ms 92888 KB Output is correct
16 Correct 20 ms 92992 KB Output is correct
17 Correct 20 ms 92508 KB Output is correct
18 Correct 22 ms 92760 KB Output is correct
19 Correct 20 ms 92356 KB Output is correct
20 Correct 20 ms 92752 KB Output is correct
21 Correct 19 ms 92508 KB Output is correct
22 Correct 33 ms 91988 KB Output is correct
23 Correct 18 ms 91996 KB Output is correct
24 Correct 20 ms 93344 KB Output is correct
25 Correct 21 ms 93276 KB Output is correct
26 Correct 20 ms 93276 KB Output is correct
27 Correct 17 ms 92164 KB Output is correct
28 Correct 21 ms 93016 KB Output is correct
29 Correct 19 ms 93020 KB Output is correct
30 Correct 20 ms 92504 KB Output is correct
31 Correct 19 ms 92656 KB Output is correct
32 Correct 23 ms 92508 KB Output is correct
33 Correct 114 ms 145572 KB Output is correct
34 Correct 128 ms 145768 KB Output is correct
35 Correct 20 ms 93256 KB Output is correct
36 Correct 110 ms 131524 KB Output is correct
37 Correct 110 ms 131520 KB Output is correct
38 Correct 188 ms 114008 KB Output is correct
39 Correct 125 ms 129984 KB Output is correct
40 Correct 192 ms 118788 KB Output is correct
41 Correct 181 ms 114144 KB Output is correct
42 Correct 100 ms 130100 KB Output is correct
43 Correct 307 ms 115236 KB Output is correct
44 Correct 126 ms 137440 KB Output is correct
45 Correct 124 ms 115524 KB Output is correct
46 Correct 113 ms 113416 KB Output is correct
47 Correct 109 ms 113160 KB Output is correct
48 Correct 109 ms 113408 KB Output is correct
49 Correct 110 ms 113092 KB Output is correct
50 Correct 117 ms 112724 KB Output is correct
51 Correct 137 ms 145656 KB Output is correct
52 Correct 146 ms 145600 KB Output is correct
53 Correct 130 ms 145852 KB Output is correct
54 Correct 137 ms 133056 KB Output is correct
55 Correct 110 ms 128112 KB Output is correct
56 Correct 116 ms 131820 KB Output is correct
57 Correct 157 ms 111952 KB Output is correct
58 Correct 166 ms 115372 KB Output is correct
59 Correct 134 ms 119912 KB Output is correct
60 Correct 178 ms 112420 KB Output is correct
61 Correct 134 ms 131192 KB Output is correct
62 Correct 221 ms 113492 KB Output is correct
63 Correct 120 ms 134344 KB Output is correct
64 Correct 123 ms 114808 KB Output is correct
65 Correct 116 ms 113436 KB Output is correct
66 Correct 130 ms 109900 KB Output is correct
67 Correct 118 ms 112328 KB Output is correct
68 Correct 127 ms 114096 KB Output is correct
69 Correct 106 ms 107088 KB Output is correct
70 Correct 109 ms 106068 KB Output is correct
71 Correct 139 ms 121800 KB Output is correct