oj.uz

Submission #1000970

# Submission time Handle Problem Language Result Execution time Memory
1000970 2024-06-18T12:02:16 Z LucaLucaM Tourism (JOI23_tourism) C++17
10 / 100
 133 ms 140616 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <cassert>
#include <cstring>
#include <set>
#warning That's the baby, that's not my baby

#define debug(x) #x << " = " << x << '\n'

typedef long long ll;

const int NMAX = 3e5;
const int LGMAX = 18;

int aib[NMAX + 1];
int answer[NMAX + 1];

int a[NMAX + 1];

std::vector<int> g[NMAX + 1];
std::set<std::pair<int, int>> queries[NMAX + 1];
std::vector<std::pair<int, int>> curQ[NMAX + 1];

int depth[NMAX + 1];
int tin[NMAX + 1], tout[NMAX + 1], timer;

int jump[LGMAX + 1][NMAX + 1];

int sum[NMAX + 1];
int added[NMAX + 1], added2[NMAX + 1];
int parent[NMAX + 1];

bool ancestor(int u, int v) {
  return tin[u] <= tin[v] && tout[v] <= tout[u];
}

int lca(int u, int v) {
  if (ancestor(u, v)) {
    return u;
  }
  for (int k = LGMAX; k >= 0; k--) {
    if (jump[k][u] != 0 && !ancestor(jump[k][u], v)) {
      u = jump[k][u];
    }
  }
  return jump[0][u];
}

void dfs(int u, int p = 0) {
  depth[u] = depth[p] + 1;
  tin[u] = ++timer;
  jump[0][u] = p;
  for (const auto &v : g[u]) {
    if (v != p) {
      dfs(v, u);
    }
  }
  tout[u] = timer;
}

void dfs1(int u) {
  for (const auto &v : g[u]) {
    if (v != parent[u]) {
      parent[v] = u;
      dfs1(v);
    }
  }
}

std::vector<std::pair<int, int>> updates;

void update(int pos, const int &val) {
  updates.push_back({pos, val});
  for (; pos <= NMAX; pos += pos & -pos) {
    aib[pos] += val;
  }
}

int query(int pos) {
  int ret = 0;
  for (; pos > 0; pos -= pos & -pos) {
    ret += aib[pos];
  }
  return ret;
}

void divide(int l, int r) {
  if (l >= r) {
    return;
  }
  int mid = (l + r) / 2;
  for (int i = mid + 1; i <= r; i++) {
    if (queries[i].empty()) {
      continue;
    }
    if ((*queries[i].begin()).first > mid) {
      continue;
    }
    auto st = queries[i].lower_bound({l, 0});
    auto it = st;
    while (it != queries[i].end() && it -> first <= mid) {
      curQ[i].push_back(*it);
      it = next(it);
    }
    for (const auto &[L, index] : curQ[i]) {
      queries[i].erase({L, index});
    }
  }


  std::vector<int> vert;
  for (int i = l; i <= r; i++) {
    vert.push_back(a[i]);
  }
  std::sort(vert.begin(), vert.end(), [&](int x, int y) {
    return tin[x] < tin[y];
  });
  vert.erase(std::unique(vert.begin(), vert.end()), vert.end());
  int sz = (int) vert.size();
  for (int i = 1; i < sz; i++) {
    vert.push_back(lca(vert[i - 1], vert[i]));
  }
  std::sort(vert.begin(), vert.end(), [&](int x, int y) {
    return tin[x] < tin[y];
  });
  vert.erase(std::unique(vert.begin(), vert.end()), vert.end());
  for (int i = 1; i < (int) vert.size(); i++) {
    int w = lca(vert[i - 1], vert[i]);
    g[w].push_back(vert[i]);
    g[vert[i]].push_back(w);
  }
//  if (l == 1 && r == 3) {
//    std::cout << "? " << (int) curQ[3].size() << '\n';
//    for (const auto &u : vert) {
//      std::cout << u << ' ';
//    }
//    std::cout << "\n\n";
//  }
  for (const auto &u : vert) {
    parent[u] = 0;
  }
  dfs1(a[mid]);
  for (const auto &u : vert) {
    added[u] = added2[u] = 0;
  }
  sum[mid] = 0;
  added[a[mid]] = added2[a[mid]] = mid;

  for (int i = mid - 1; i >= l; i--) {
    int u = a[i];
    int add = 0;
    while (!added[u]) {
      added[u] = i;
      add += std::abs(depth[u] - depth[parent[u]]);
      u = parent[u];
    }
    sum[i] = sum[i + 1] + add;
  }

  for (int i = mid + 1; i <= r; i++) {
    int u = a[i];
    while (!added2[u]) {
      if (added[u] != mid) {
        update(added[u] + 1, std::abs(depth[u] - depth[parent[u]]));
      }
      added2[u] = i;
      u = parent[u];
    }
    for (const auto &[L, index] : curQ[i]) {
      answer[index] = query(L) + sum[L];
    }
    curQ[i].clear();
  }

  for (const auto &[x, y] : updates) {
    update(x, -y);
  }
  updates.clear();
  for (const auto &u : vert) {
    g[u].clear();
  }

  if (l < r) {
    divide(l, mid);
    divide(mid + 1, r);
  }
}

int main() {
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(0);

  int n, m, q;
  std::cin >> n >> m >> q;

  for (int i = 1; i < n; i++) {
    int u, v;
    std::cin >> u >> v;
    g[u].push_back(v);
    g[v].push_back(u);
  }

  dfs(1);

  for (int k = 1; k <= LGMAX; k++) {
    for (int i = 1; i <= n; i++) {
      jump[k][i] = jump[k - 1][jump[k - 1][i]];
    }
  }

  for (int i = 1; i <= m; i++) {
    std::cin >> a[i];
  }

  for (int i = 0; i < q; i++) {
    int l, r;
    std::cin >> l >> r;
    if (l != r) {
      queries[r].insert({l, i});
    } else {
      answer[i] = 0;
    }
  }

  for (int i = 1; i <= n; i++) {
    g[i].clear();
  }

  divide(1, m);

//  std::cout << "\n\nMy debug:\n\n";
//  for (int i = 1; i <= n; i++) {
//    std::cout << depth[i] << ' ';
//  }
//  std::cout << '\n';
//
//  std::cout << "\n\nYour queries:\n\n";

  for (int i = 0; i < q; i++) {
    std::cout << answer[i] + 1 << '\n';
  }

  return 0;
}

Compilation message

tourism.cpp:7:2: warning: #warning That's the baby, that's not my baby [-Wcpp]
    7 | #warning That's the baby, that's not my baby
      |  ^~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 59740 KB Output is correct
2 Correct 8 ms 59984 KB Output is correct
3 Correct 8 ms 59740 KB Output is correct
4 Correct 8 ms 59868 KB Output is correct
5 Correct 8 ms 59996 KB Output is correct
6 Correct 9 ms 59856 KB Output is correct
7 Correct 8 ms 59996 KB Output is correct
8 Correct 8 ms 59996 KB Output is correct
9 Correct 8 ms 59832 KB Output is correct
10 Correct 7 ms 59996 KB Output is correct
11 Correct 10 ms 59884 KB Output is correct
12 Correct 9 ms 59992 KB Output is correct
13 Correct 9 ms 60028 KB Output is correct
14 Correct 11 ms 59996 KB Output is correct
15 Correct 8 ms 59872 KB Output is correct
16 Correct 8 ms 59996 KB Output is correct
17 Correct 9 ms 59924 KB Output is correct
18 Correct 8 ms 59996 KB Output is correct
19 Correct 9 ms 59832 KB Output is correct
20 Correct 8 ms 59924 KB Output is correct
21 Correct 9 ms 59996 KB Output is correct
22 Correct 8 ms 59924 KB Output is correct
23 Correct 8 ms 59848 KB Output is correct
24 Correct 8 ms 59996 KB Output is correct
25 Correct 9 ms 59920 KB Output is correct
26 Correct 9 ms 59960 KB Output is correct
27 Correct 9 ms 59996 KB Output is correct
28 Correct 7 ms 55900 KB Output is correct
29 Correct 9 ms 60008 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 59740 KB Output is correct
2 Correct 8 ms 59984 KB Output is correct
3 Correct 8 ms 59740 KB Output is correct
4 Correct 8 ms 59868 KB Output is correct
5 Correct 8 ms 59996 KB Output is correct
6 Correct 9 ms 59856 KB Output is correct
7 Correct 8 ms 59996 KB Output is correct
8 Correct 8 ms 59996 KB Output is correct
9 Correct 8 ms 59832 KB Output is correct
10 Correct 7 ms 59996 KB Output is correct
11 Correct 10 ms 59884 KB Output is correct
12 Correct 9 ms 59992 KB Output is correct
13 Correct 9 ms 60028 KB Output is correct
14 Correct 11 ms 59996 KB Output is correct
15 Correct 8 ms 59872 KB Output is correct
16 Correct 8 ms 59996 KB Output is correct
17 Correct 9 ms 59924 KB Output is correct
18 Correct 8 ms 59996 KB Output is correct
19 Correct 9 ms 59832 KB Output is correct
20 Correct 8 ms 59924 KB Output is correct
21 Correct 9 ms 59996 KB Output is correct
22 Correct 8 ms 59924 KB Output is correct
23 Correct 8 ms 59848 KB Output is correct
24 Correct 8 ms 59996 KB Output is correct
25 Correct 9 ms 59920 KB Output is correct
26 Correct 9 ms 59960 KB Output is correct
27 Correct 9 ms 59996 KB Output is correct
28 Correct 7 ms 55900 KB Output is correct
29 Correct 9 ms 60008 KB Output is correct
30 Correct 14 ms 60184 KB Output is correct
31 Correct 13 ms 60240 KB Output is correct
32 Correct 15 ms 60256 KB Output is correct
33 Correct 15 ms 60312 KB Output is correct
34 Correct 16 ms 60156 KB Output is correct
35 Correct 17 ms 60264 KB Output is correct
36 Correct 16 ms 60256 KB Output is correct
37 Correct 15 ms 60256 KB Output is correct
38 Correct 16 ms 60276 KB Output is correct
39 Correct 13 ms 60376 KB Output is correct
40 Correct 15 ms 60256 KB Output is correct
41 Correct 12 ms 60512 KB Output is correct
42 Correct 12 ms 60256 KB Output is correct
43 Correct 14 ms 60248 KB Output is correct
44 Correct 14 ms 60120 KB Output is correct
45 Correct 14 ms 60252 KB Output is correct
46 Correct 15 ms 60116 KB Output is correct
47 Correct 13 ms 60248 KB Output is correct
48 Correct 17 ms 60252 KB Output is correct
49 Correct 13 ms 60252 KB Output is correct
50 Correct 13 ms 60248 KB Output is correct
51 Correct 12 ms 60252 KB Output is correct
52 Correct 12 ms 60276 KB Output is correct
53 Correct 12 ms 60252 KB Output is correct
54 Correct 12 ms 60252 KB Output is correct
55 Correct 13 ms 60292 KB Output is correct
56 Correct 9 ms 59996 KB Output is correct
57 Correct 8 ms 55836 KB Output is correct
58 Correct 14 ms 59992 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 59740 KB Output is correct
2 Correct 8 ms 59992 KB Output is correct
3 Correct 9 ms 59996 KB Output is correct
4 Runtime error 110 ms 140616 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 59736 KB Output is correct
2 Runtime error 86 ms 127564 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #5
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 59740 KB Output is correct
2 Correct 7 ms 59996 KB Output is correct
3 Correct 12 ms 59992 KB Output is correct
4 Runtime error 133 ms 137140 KB Execution killed with signal 11
5 Halted 0 ms 0 KB -

Subtask #6
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 59740 KB Output is correct
2 Correct 8 ms 59984 KB Output is correct
3 Correct 8 ms 59740 KB Output is correct
4 Correct 8 ms 59868 KB Output is correct
5 Correct 8 ms 59996 KB Output is correct
6 Correct 9 ms 59856 KB Output is correct
7 Correct 8 ms 59996 KB Output is correct
8 Correct 8 ms 59996 KB Output is correct
9 Correct 8 ms 59832 KB Output is correct
10 Correct 7 ms 59996 KB Output is correct
11 Correct 10 ms 59884 KB Output is correct
12 Correct 9 ms 59992 KB Output is correct
13 Correct 9 ms 60028 KB Output is correct
14 Correct 11 ms 59996 KB Output is correct
15 Correct 8 ms 59872 KB Output is correct
16 Correct 8 ms 59996 KB Output is correct
17 Correct 9 ms 59924 KB Output is correct
18 Correct 8 ms 59996 KB Output is correct
19 Correct 9 ms 59832 KB Output is correct
20 Correct 8 ms 59924 KB Output is correct
21 Correct 9 ms 59996 KB Output is correct
22 Correct 8 ms 59924 KB Output is correct
23 Correct 8 ms 59848 KB Output is correct
24 Correct 8 ms 59996 KB Output is correct
25 Correct 9 ms 59920 KB Output is correct
26 Correct 9 ms 59960 KB Output is correct
27 Correct 9 ms 59996 KB Output is correct
28 Correct 7 ms 55900 KB Output is correct
29 Correct 9 ms 60008 KB Output is correct
30 Correct 14 ms 60184 KB Output is correct
31 Correct 13 ms 60240 KB Output is correct
32 Correct 15 ms 60256 KB Output is correct
33 Correct 15 ms 60312 KB Output is correct
34 Correct 16 ms 60156 KB Output is correct
35 Correct 17 ms 60264 KB Output is correct
36 Correct 16 ms 60256 KB Output is correct
37 Correct 15 ms 60256 KB Output is correct
38 Correct 16 ms 60276 KB Output is correct
39 Correct 13 ms 60376 KB Output is correct
40 Correct 15 ms 60256 KB Output is correct
41 Correct 12 ms 60512 KB Output is correct
42 Correct 12 ms 60256 KB Output is correct
43 Correct 14 ms 60248 KB Output is correct
44 Correct 14 ms 60120 KB Output is correct
45 Correct 14 ms 60252 KB Output is correct
46 Correct 15 ms 60116 KB Output is correct
47 Correct 13 ms 60248 KB Output is correct
48 Correct 17 ms 60252 KB Output is correct
49 Correct 13 ms 60252 KB Output is correct
50 Correct 13 ms 60248 KB Output is correct
51 Correct 12 ms 60252 KB Output is correct
52 Correct 12 ms 60276 KB Output is correct
53 Correct 12 ms 60252 KB Output is correct
54 Correct 12 ms 60252 KB Output is correct
55 Correct 13 ms 60292 KB Output is correct
56 Correct 9 ms 59996 KB Output is correct
57 Correct 8 ms 55836 KB Output is correct
58 Correct 14 ms 59992 KB Output is correct
59 Correct 9 ms 59740 KB Output is correct
60 Correct 8 ms 59992 KB Output is correct
61 Correct 9 ms 59996 KB Output is correct
62 Runtime error 110 ms 140616 KB Execution killed with signal 11
63 Halted 0 ms 0 KB -