oj.uz

Submission #1000986

# Submission time Handle Problem Language Result Execution time Memory
1000986 2024-06-18T12:16:55 Z LucaLucaM Tourism (JOI23_tourism) C++17
10 / 100
 119 ms 140536 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, int p = 0) {
  parent[u] = p;
  for (const auto &v : g[u]) {
    if (v != p) {
      dfs1(v, u);
    }
  }
}

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

void update(int pos, const int &val) {
  if (val != 0) {
    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;
}

bool cmp(int x, int y) {
  return tin[x] < tin[y];
}

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].rbegin()).first < l) {
      continue;
    }
    auto st = queries[i].lower_bound({l, 0});
    auto it = st;
    while (it != queries[i].end() && it -> first <= mid) {
      while (it -> first < l);
      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());
  vert.erase(std::unique(vert.begin(), vert.end()), vert.end());
  std::sort(vert.begin(), vert.end(), cmp);
  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());
  vert.erase(std::unique(vert.begin(), vert.end()), vert.end());
  std::sort(vert.begin(), vert.end(), cmp);
  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);
  }
  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);

  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 7 ms 59736 KB Output is correct
2 Correct 7 ms 59872 KB Output is correct
3 Correct 7 ms 59740 KB Output is correct
4 Correct 8 ms 59880 KB Output is correct
5 Correct 8 ms 59996 KB Output is correct
6 Correct 7 ms 59996 KB Output is correct
7 Correct 7 ms 59996 KB Output is correct
8 Correct 7 ms 59864 KB Output is correct
9 Correct 8 ms 59996 KB Output is correct
10 Correct 8 ms 59996 KB Output is correct
11 Correct 9 ms 59832 KB Output is correct
12 Correct 8 ms 59928 KB Output is correct
13 Correct 9 ms 59992 KB Output is correct
14 Correct 8 ms 59880 KB Output is correct
15 Correct 8 ms 59992 KB Output is correct
16 Correct 7 ms 59996 KB Output is correct
17 Correct 8 ms 59996 KB Output is correct
18 Correct 9 ms 59996 KB Output is correct
19 Correct 9 ms 59996 KB Output is correct
20 Correct 9 ms 60024 KB Output is correct
21 Correct 8 ms 59852 KB Output is correct
22 Correct 8 ms 59996 KB Output is correct
23 Correct 8 ms 59996 KB Output is correct
24 Correct 8 ms 59996 KB Output is correct
25 Correct 8 ms 59956 KB Output is correct
26 Correct 9 ms 59992 KB Output is correct
27 Correct 8 ms 59992 KB Output is correct
28 Correct 7 ms 55892 KB Output is correct
29 Correct 9 ms 59996 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 59736 KB Output is correct
2 Correct 7 ms 59872 KB Output is correct
3 Correct 7 ms 59740 KB Output is correct
4 Correct 8 ms 59880 KB Output is correct
5 Correct 8 ms 59996 KB Output is correct
6 Correct 7 ms 59996 KB Output is correct
7 Correct 7 ms 59996 KB Output is correct
8 Correct 7 ms 59864 KB Output is correct
9 Correct 8 ms 59996 KB Output is correct
10 Correct 8 ms 59996 KB Output is correct
11 Correct 9 ms 59832 KB Output is correct
12 Correct 8 ms 59928 KB Output is correct
13 Correct 9 ms 59992 KB Output is correct
14 Correct 8 ms 59880 KB Output is correct
15 Correct 8 ms 59992 KB Output is correct
16 Correct 7 ms 59996 KB Output is correct
17 Correct 8 ms 59996 KB Output is correct
18 Correct 9 ms 59996 KB Output is correct
19 Correct 9 ms 59996 KB Output is correct
20 Correct 9 ms 60024 KB Output is correct
21 Correct 8 ms 59852 KB Output is correct
22 Correct 8 ms 59996 KB Output is correct
23 Correct 8 ms 59996 KB Output is correct
24 Correct 8 ms 59996 KB Output is correct
25 Correct 8 ms 59956 KB Output is correct
26 Correct 9 ms 59992 KB Output is correct
27 Correct 8 ms 59992 KB Output is correct
28 Correct 7 ms 55892 KB Output is correct
29 Correct 9 ms 59996 KB Output is correct
30 Correct 13 ms 59992 KB Output is correct
31 Correct 14 ms 60196 KB Output is correct
32 Correct 17 ms 60252 KB Output is correct
33 Correct 17 ms 60264 KB Output is correct
34 Correct 16 ms 60252 KB Output is correct
35 Correct 15 ms 59996 KB Output is correct
36 Correct 16 ms 60044 KB Output is correct
37 Correct 16 ms 59996 KB Output is correct
38 Correct 16 ms 60320 KB Output is correct
39 Correct 14 ms 60324 KB Output is correct
40 Correct 14 ms 60328 KB Output is correct
41 Correct 14 ms 60248 KB Output is correct
42 Correct 16 ms 60248 KB Output is correct
43 Correct 14 ms 60252 KB Output is correct
44 Correct 15 ms 60252 KB Output is correct
45 Correct 15 ms 60504 KB Output is correct
46 Correct 15 ms 60252 KB Output is correct
47 Correct 14 ms 60252 KB Output is correct
48 Correct 14 ms 59996 KB Output is correct
49 Correct 16 ms 60248 KB Output is correct
50 Correct 15 ms 60248 KB Output is correct
51 Correct 14 ms 60252 KB Output is correct
52 Correct 14 ms 60248 KB Output is correct
53 Correct 14 ms 60248 KB Output is correct
54 Correct 15 ms 60252 KB Output is correct
55 Correct 14 ms 60240 KB Output is correct
56 Correct 9 ms 59996 KB Output is correct
57 Correct 8 ms 55792 KB Output is correct
58 Correct 16 ms 59996 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 59736 KB Output is correct
2 Correct 8 ms 59996 KB Output is correct
3 Correct 9 ms 59992 KB Output is correct
4 Runtime error 112 ms 140536 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 7 ms 59736 KB Output is correct
2 Runtime error 89 ms 127516 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 8 ms 59948 KB Output is correct
3 Correct 9 ms 59992 KB Output is correct
4 Runtime error 119 ms 137216 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 7 ms 59736 KB Output is correct
2 Correct 7 ms 59872 KB Output is correct
3 Correct 7 ms 59740 KB Output is correct
4 Correct 8 ms 59880 KB Output is correct
5 Correct 8 ms 59996 KB Output is correct
6 Correct 7 ms 59996 KB Output is correct
7 Correct 7 ms 59996 KB Output is correct
8 Correct 7 ms 59864 KB Output is correct
9 Correct 8 ms 59996 KB Output is correct
10 Correct 8 ms 59996 KB Output is correct
11 Correct 9 ms 59832 KB Output is correct
12 Correct 8 ms 59928 KB Output is correct
13 Correct 9 ms 59992 KB Output is correct
14 Correct 8 ms 59880 KB Output is correct
15 Correct 8 ms 59992 KB Output is correct
16 Correct 7 ms 59996 KB Output is correct
17 Correct 8 ms 59996 KB Output is correct
18 Correct 9 ms 59996 KB Output is correct
19 Correct 9 ms 59996 KB Output is correct
20 Correct 9 ms 60024 KB Output is correct
21 Correct 8 ms 59852 KB Output is correct
22 Correct 8 ms 59996 KB Output is correct
23 Correct 8 ms 59996 KB Output is correct
24 Correct 8 ms 59996 KB Output is correct
25 Correct 8 ms 59956 KB Output is correct
26 Correct 9 ms 59992 KB Output is correct
27 Correct 8 ms 59992 KB Output is correct
28 Correct 7 ms 55892 KB Output is correct
29 Correct 9 ms 59996 KB Output is correct
30 Correct 13 ms 59992 KB Output is correct
31 Correct 14 ms 60196 KB Output is correct
32 Correct 17 ms 60252 KB Output is correct
33 Correct 17 ms 60264 KB Output is correct
34 Correct 16 ms 60252 KB Output is correct
35 Correct 15 ms 59996 KB Output is correct
36 Correct 16 ms 60044 KB Output is correct
37 Correct 16 ms 59996 KB Output is correct
38 Correct 16 ms 60320 KB Output is correct
39 Correct 14 ms 60324 KB Output is correct
40 Correct 14 ms 60328 KB Output is correct
41 Correct 14 ms 60248 KB Output is correct
42 Correct 16 ms 60248 KB Output is correct
43 Correct 14 ms 60252 KB Output is correct
44 Correct 15 ms 60252 KB Output is correct
45 Correct 15 ms 60504 KB Output is correct
46 Correct 15 ms 60252 KB Output is correct
47 Correct 14 ms 60252 KB Output is correct
48 Correct 14 ms 59996 KB Output is correct
49 Correct 16 ms 60248 KB Output is correct
50 Correct 15 ms 60248 KB Output is correct
51 Correct 14 ms 60252 KB Output is correct
52 Correct 14 ms 60248 KB Output is correct
53 Correct 14 ms 60248 KB Output is correct
54 Correct 15 ms 60252 KB Output is correct
55 Correct 14 ms 60240 KB Output is correct
56 Correct 9 ms 59996 KB Output is correct
57 Correct 8 ms 55792 KB Output is correct
58 Correct 16 ms 59996 KB Output is correct
59 Correct 8 ms 59736 KB Output is correct
60 Correct 8 ms 59996 KB Output is correct
61 Correct 9 ms 59992 KB Output is correct
62 Runtime error 112 ms 140536 KB Execution killed with signal 11
63 Halted 0 ms 0 KB -