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Submission #298903

# Submission time Handle Problem Language Result Execution time Memory
298903 2020-09-14T09:53:24 Z Bruteforceman Tax Evasion (LMIO19_mokesciai) C++11
61 / 100
 2000 ms 40952 KB 
#include <bits/stdc++.h>
using namespace std;
const int maxn = 2e5 + 10;
const int logn = 19;
vector <int> g[maxn];
int par[maxn];
int dep[maxn];
int vis[maxn];
int anc[logn + 1][maxn];
int lift(int x, int depth) {
  for(int i = logn; i >= 0; i--) {
    if(dep[x] - (1 << i) > depth) {
      x = anc[i][x];
    }
  }
  return x;
}
void dfs(int x) {
  for(int i : g[x]) {
    dep[i] = 1 + dep[x];
    dfs(i);
  }
}
pair <int, int> getFarthest(int x) {
  if(vis[x]) return make_pair(0, x);
  pair <int, int> ans (dep[x], x);
  for(int i : g[x]) {
    ans = max(ans, getFarthest(i)); 
  }
  return ans;
}
int main() {
  int n, m;
  cin >> n >> m;
  for(int i = 2; i <= n; i++) {
    cin >> par[i];
    g[par[i]].push_back(i);
    anc[0][i] = par[i];
  }
  for(int i = 1; i <= logn; i++) {
    for(int j = 1; j <= n; j++) {
      anc[i][j] = anc[i - 1][anc[i - 1][j]];
    }
  }
  dep[1] = 1;
  dfs(1);
  vector <pair <int, int>> v;
  for(int i = 1; i <= m; i++) {
    int x;
    cin >> x;
    v.emplace_back(dep[x], x);
    if(x == 1) {
      cout << 1 << endl;
      exit(0);
    }
  }
  for(auto &i : v) {
    int top = (i.first + 1) / 2;
    i.second = lift(i.second, top);
    i.first = dep[i.second];
  }
  sort(v.begin(), v.end(), greater <pair <int, int>> ());
  int ans = n;
  for(auto &i : v) {
    auto j = getFarthest(i.second);
    vis[j.second] = true;
    ans = min(ans, j.first);
  }
  cout << ans << endl;
  return 0;
}

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5120 KB Output is correct
3 Correct 120 ms 5888 KB Output is correct
4 Correct 119 ms 6016 KB Output is correct
5 Correct 143 ms 6016 KB Output is correct
6 Correct 165 ms 39800 KB Output is correct
7 Correct 163 ms 40952 KB Output is correct
8 Correct 7 ms 6016 KB Output is correct
9 Execution timed out 2051 ms 36968 KB Time limit exceeded
10 Halted 0 ms 0 KB -

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 7 ms 5760 KB Output is correct
3 Correct 7 ms 5888 KB Output is correct
4 Correct 6 ms 5632 KB Output is correct
5 Correct 7 ms 5760 KB Output is correct
6 Correct 7 ms 5632 KB Output is correct
7 Correct 165 ms 39800 KB Output is correct
8 Correct 163 ms 40952 KB Output is correct
9 Correct 7 ms 6016 KB Output is correct
10 Correct 145 ms 29044 KB Output is correct
11 Correct 144 ms 29044 KB Output is correct
12 Correct 129 ms 24688 KB Output is correct
13 Correct 158 ms 31440 KB Output is correct
14 Correct 140 ms 25336 KB Output is correct
15 Correct 132 ms 24952 KB Output is correct
16 Correct 157 ms 32248 KB Output is correct
17 Correct 180 ms 25464 KB Output is correct
18 Correct 155 ms 34680 KB Output is correct
19 Correct 157 ms 29208 KB Output is correct
20 Correct 150 ms 28536 KB Output is correct
21 Correct 150 ms 28536 KB Output is correct
22 Correct 151 ms 28664 KB Output is correct
23 Correct 159 ms 28408 KB Output is correct
24 Correct 149 ms 28536 KB Output is correct

Subtask #3
39.0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5248 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 67 ms 5788 KB Output is correct
7 Correct 33 ms 5760 KB Output is correct
8 Correct 145 ms 5880 KB Output is correct
9 Correct 12 ms 5632 KB Output is correct
10 Correct 6 ms 5632 KB Output is correct
11 Correct 17 ms 5760 KB Output is correct
12 Correct 16 ms 5632 KB Output is correct
13 Correct 119 ms 5880 KB Output is correct
14 Correct 12 ms 5760 KB Output is correct
15 Correct 81 ms 6016 KB Output is correct
16 Correct 46 ms 5912 KB Output is correct
17 Correct 17 ms 5760 KB Output is correct
18 Correct 66 ms 5888 KB Output is correct
19 Correct 9 ms 5760 KB Output is correct
20 Correct 92 ms 5632 KB Output is correct
21 Correct 27 ms 5632 KB Output is correct
22 Correct 4 ms 5120 KB Output is correct
23 Correct 4 ms 5120 KB Output is correct
24 Correct 120 ms 5888 KB Output is correct
25 Correct 119 ms 6016 KB Output is correct
26 Correct 143 ms 6016 KB Output is correct
27 Correct 4 ms 5120 KB Output is correct
28 Correct 7 ms 5760 KB Output is correct
29 Correct 7 ms 5888 KB Output is correct
30 Correct 6 ms 5632 KB Output is correct
31 Correct 7 ms 5760 KB Output is correct
32 Correct 7 ms 5632 KB Output is correct
33 Correct 7 ms 6016 KB Output is correct

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 5120 KB Output is correct
2 Correct 4 ms 5248 KB Output is correct
3 Correct 4 ms 5120 KB Output is correct
4 Correct 4 ms 5120 KB Output is correct
5 Correct 4 ms 5120 KB Output is correct
6 Correct 67 ms 5788 KB Output is correct
7 Correct 33 ms 5760 KB Output is correct
8 Correct 145 ms 5880 KB Output is correct
9 Correct 12 ms 5632 KB Output is correct
10 Correct 6 ms 5632 KB Output is correct
11 Correct 17 ms 5760 KB Output is correct
12 Correct 16 ms 5632 KB Output is correct
13 Correct 119 ms 5880 KB Output is correct
14 Correct 12 ms 5760 KB Output is correct
15 Correct 81 ms 6016 KB Output is correct
16 Correct 46 ms 5912 KB Output is correct
17 Correct 17 ms 5760 KB Output is correct
18 Correct 66 ms 5888 KB Output is correct
19 Correct 9 ms 5760 KB Output is correct
20 Correct 92 ms 5632 KB Output is correct
21 Correct 27 ms 5632 KB Output is correct
22 Correct 4 ms 5120 KB Output is correct
23 Correct 4 ms 5120 KB Output is correct
24 Correct 120 ms 5888 KB Output is correct
25 Correct 119 ms 6016 KB Output is correct
26 Correct 143 ms 6016 KB Output is correct
27 Correct 4 ms 5120 KB Output is correct
28 Correct 7 ms 5760 KB Output is correct
29 Correct 7 ms 5888 KB Output is correct
30 Correct 6 ms 5632 KB Output is correct
31 Correct 7 ms 5760 KB Output is correct
32 Correct 7 ms 5632 KB Output is correct
33 Correct 165 ms 39800 KB Output is correct
34 Correct 163 ms 40952 KB Output is correct
35 Correct 7 ms 6016 KB Output is correct
36 Correct 145 ms 29044 KB Output is correct
37 Correct 144 ms 29044 KB Output is correct
38 Correct 129 ms 24688 KB Output is correct
39 Correct 158 ms 31440 KB Output is correct
40 Correct 140 ms 25336 KB Output is correct
41 Correct 132 ms 24952 KB Output is correct
42 Correct 157 ms 32248 KB Output is correct
43 Correct 180 ms 25464 KB Output is correct
44 Correct 155 ms 34680 KB Output is correct
45 Correct 157 ms 29208 KB Output is correct
46 Correct 150 ms 28536 KB Output is correct
47 Correct 150 ms 28536 KB Output is correct
48 Correct 151 ms 28664 KB Output is correct
49 Correct 159 ms 28408 KB Output is correct
50 Correct 149 ms 28536 KB Output is correct
51 Execution timed out 2051 ms 36968 KB Time limit exceeded
52 Halted 0 ms 0 KB -