oj.uz

Submission #1000889

# Submission time Handle Problem Language Result Execution time Memory
1000889 2024-06-18T10:56:59 Z LucaLucaM Tourism (JOI23_tourism) C++17
34 / 100
 380 ms 59076 KB 
#include <iostream>
#include <vector>
#include <algorithm>
#include <cassert>
#include <cstring>
#include <functional>
#warning That's the baby, that's not my baby

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

typedef long long ll;

const int NMAX = 1e5;
const int LGMAX = 16;

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

int a[NMAX + 1];

std::vector<int> g[NMAX + 1];
std::vector<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, std::vector<std::tuple<int, int, int>> queries) {
  if (l > r || queries.empty()) {
    return;
  }
  int mid = (l + r) / 2;
  std::vector<std::tuple<int, int, int>> quel, quer;
  for (const auto &[l, r, index] : queries) {
    if (r <= mid) {
      quel.push_back({l, r, index});
    } else if (mid < l) {
      quer.push_back({l, r, index});
    } else {
      curQ[r].push_back({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);
  }
  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();
  }
  divide(l, mid, quel);
  divide(mid + 1, r, quer);
}

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];
  }

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

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

  divide(1, m, queries);

//  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 2 ms 14684 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 KB Output is correct
6 Correct 2 ms 14684 KB Output is correct
7 Correct 2 ms 14684 KB Output is correct
8 Correct 2 ms 14680 KB Output is correct
9 Correct 3 ms 14940 KB Output is correct
10 Correct 3 ms 14936 KB Output is correct
11 Correct 2 ms 14940 KB Output is correct
12 Correct 2 ms 14684 KB Output is correct
13 Correct 2 ms 14684 KB Output is correct
14 Correct 2 ms 14856 KB Output is correct
15 Correct 2 ms 14940 KB Output is correct
16 Correct 2 ms 14940 KB Output is correct
17 Correct 3 ms 14940 KB Output is correct
18 Correct 2 ms 14940 KB Output is correct
19 Correct 2 ms 14940 KB Output is correct
20 Correct 3 ms 14940 KB Output is correct
21 Correct 3 ms 14940 KB Output is correct
22 Correct 2 ms 14940 KB Output is correct
23 Correct 2 ms 14940 KB Output is correct
24 Correct 3 ms 14936 KB Output is correct
25 Correct 2 ms 14936 KB Output is correct
26 Correct 2 ms 14940 KB Output is correct
27 Correct 2 ms 14684 KB Output is correct
28 Correct 2 ms 14784 KB Output is correct
29 Correct 2 ms 14684 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 KB Output is correct
6 Correct 2 ms 14684 KB Output is correct
7 Correct 2 ms 14684 KB Output is correct
8 Correct 2 ms 14680 KB Output is correct
9 Correct 3 ms 14940 KB Output is correct
10 Correct 3 ms 14936 KB Output is correct
11 Correct 2 ms 14940 KB Output is correct
12 Correct 2 ms 14684 KB Output is correct
13 Correct 2 ms 14684 KB Output is correct
14 Correct 2 ms 14856 KB Output is correct
15 Correct 2 ms 14940 KB Output is correct
16 Correct 2 ms 14940 KB Output is correct
17 Correct 3 ms 14940 KB Output is correct
18 Correct 2 ms 14940 KB Output is correct
19 Correct 2 ms 14940 KB Output is correct
20 Correct 3 ms 14940 KB Output is correct
21 Correct 3 ms 14940 KB Output is correct
22 Correct 2 ms 14940 KB Output is correct
23 Correct 2 ms 14940 KB Output is correct
24 Correct 3 ms 14936 KB Output is correct
25 Correct 2 ms 14936 KB Output is correct
26 Correct 2 ms 14940 KB Output is correct
27 Correct 2 ms 14684 KB Output is correct
28 Correct 2 ms 14784 KB Output is correct
29 Correct 2 ms 14684 KB Output is correct
30 Correct 5 ms 15140 KB Output is correct
31 Correct 5 ms 14940 KB Output is correct
32 Correct 6 ms 15196 KB Output is correct
33 Correct 6 ms 15196 KB Output is correct
34 Correct 7 ms 15196 KB Output is correct
35 Correct 3 ms 15196 KB Output is correct
36 Correct 3 ms 15196 KB Output is correct
37 Correct 3 ms 15196 KB Output is correct
38 Correct 6 ms 15192 KB Output is correct
39 Correct 5 ms 15192 KB Output is correct
40 Correct 5 ms 15080 KB Output is correct
41 Correct 3 ms 15192 KB Output is correct
42 Correct 4 ms 15196 KB Output is correct
43 Correct 3 ms 15196 KB Output is correct
44 Correct 5 ms 15196 KB Output is correct
45 Correct 6 ms 15076 KB Output is correct
46 Correct 6 ms 15196 KB Output is correct
47 Correct 3 ms 15196 KB Output is correct
48 Correct 4 ms 15192 KB Output is correct
49 Correct 4 ms 15196 KB Output is correct
50 Correct 5 ms 15192 KB Output is correct
51 Correct 7 ms 15196 KB Output is correct
52 Correct 5 ms 15196 KB Output is correct
53 Correct 5 ms 15208 KB Output is correct
54 Correct 5 ms 15196 KB Output is correct
55 Correct 4 ms 15196 KB Output is correct
56 Correct 3 ms 14940 KB Output is correct
57 Correct 3 ms 14936 KB Output is correct
58 Correct 3 ms 14940 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 3 ms 14940 KB Output is correct
4 Correct 191 ms 27228 KB Output is correct
5 Correct 144 ms 30916 KB Output is correct
6 Runtime error 70 ms 59076 KB Execution killed with signal 11
7 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14680 KB Output is correct
2 Runtime error 43 ms 37984 KB Execution killed with signal 11
3 Halted 0 ms 0 KB -

Subtask #5
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14680 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 2 ms 14940 KB Output is correct
4 Correct 296 ms 26056 KB Output is correct
5 Correct 307 ms 27848 KB Output is correct
6 Correct 347 ms 30656 KB Output is correct
7 Correct 369 ms 31944 KB Output is correct
8 Correct 367 ms 31820 KB Output is correct
9 Correct 373 ms 32124 KB Output is correct
10 Correct 366 ms 31796 KB Output is correct
11 Correct 348 ms 31944 KB Output is correct
12 Correct 380 ms 31888 KB Output is correct
13 Correct 359 ms 31684 KB Output is correct
14 Correct 40 ms 22980 KB Output is correct

Subtask #6
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 14684 KB Output is correct
2 Correct 2 ms 14684 KB Output is correct
3 Correct 2 ms 14684 KB Output is correct
4 Correct 2 ms 14684 KB Output is correct
5 Correct 2 ms 14684 KB Output is correct
6 Correct 2 ms 14684 KB Output is correct
7 Correct 2 ms 14684 KB Output is correct
8 Correct 2 ms 14680 KB Output is correct
9 Correct 3 ms 14940 KB Output is correct
10 Correct 3 ms 14936 KB Output is correct
11 Correct 2 ms 14940 KB Output is correct
12 Correct 2 ms 14684 KB Output is correct
13 Correct 2 ms 14684 KB Output is correct
14 Correct 2 ms 14856 KB Output is correct
15 Correct 2 ms 14940 KB Output is correct
16 Correct 2 ms 14940 KB Output is correct
17 Correct 3 ms 14940 KB Output is correct
18 Correct 2 ms 14940 KB Output is correct
19 Correct 2 ms 14940 KB Output is correct
20 Correct 3 ms 14940 KB Output is correct
21 Correct 3 ms 14940 KB Output is correct
22 Correct 2 ms 14940 KB Output is correct
23 Correct 2 ms 14940 KB Output is correct
24 Correct 3 ms 14936 KB Output is correct
25 Correct 2 ms 14936 KB Output is correct
26 Correct 2 ms 14940 KB Output is correct
27 Correct 2 ms 14684 KB Output is correct
28 Correct 2 ms 14784 KB Output is correct
29 Correct 2 ms 14684 KB Output is correct
30 Correct 5 ms 15140 KB Output is correct
31 Correct 5 ms 14940 KB Output is correct
32 Correct 6 ms 15196 KB Output is correct
33 Correct 6 ms 15196 KB Output is correct
34 Correct 7 ms 15196 KB Output is correct
35 Correct 3 ms 15196 KB Output is correct
36 Correct 3 ms 15196 KB Output is correct
37 Correct 3 ms 15196 KB Output is correct
38 Correct 6 ms 15192 KB Output is correct
39 Correct 5 ms 15192 KB Output is correct
40 Correct 5 ms 15080 KB Output is correct
41 Correct 3 ms 15192 KB Output is correct
42 Correct 4 ms 15196 KB Output is correct
43 Correct 3 ms 15196 KB Output is correct
44 Correct 5 ms 15196 KB Output is correct
45 Correct 6 ms 15076 KB Output is correct
46 Correct 6 ms 15196 KB Output is correct
47 Correct 3 ms 15196 KB Output is correct
48 Correct 4 ms 15192 KB Output is correct
49 Correct 4 ms 15196 KB Output is correct
50 Correct 5 ms 15192 KB Output is correct
51 Correct 7 ms 15196 KB Output is correct
52 Correct 5 ms 15196 KB Output is correct
53 Correct 5 ms 15208 KB Output is correct
54 Correct 5 ms 15196 KB Output is correct
55 Correct 4 ms 15196 KB Output is correct
56 Correct 3 ms 14940 KB Output is correct
57 Correct 3 ms 14936 KB Output is correct
58 Correct 3 ms 14940 KB Output is correct
59 Correct 2 ms 14684 KB Output is correct
60 Correct 2 ms 14684 KB Output is correct
61 Correct 3 ms 14940 KB Output is correct
62 Correct 191 ms 27228 KB Output is correct
63 Correct 144 ms 30916 KB Output is correct
64 Runtime error 70 ms 59076 KB Execution killed with signal 11
65 Halted 0 ms 0 KB -