oj.uz

Submission #1000899

# Submission time Handle Problem Language Result Execution time Memory
1000899 2024-06-18T11:01:14 Z LucaLucaM Tourism (JOI23_tourism) C++17
34 / 100
 439 ms 79572 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 = 2e5 + 7;
const int LGMAX = 18;

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, const 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);

  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 3 ms 23132 KB Output is correct
2 Correct 3 ms 23132 KB Output is correct
3 Correct 3 ms 23132 KB Output is correct
4 Correct 3 ms 23132 KB Output is correct
5 Correct 3 ms 23132 KB Output is correct
6 Correct 4 ms 23132 KB Output is correct
7 Correct 3 ms 23132 KB Output is correct
8 Correct 4 ms 23208 KB Output is correct
9 Correct 4 ms 23132 KB Output is correct
10 Correct 4 ms 23128 KB Output is correct
11 Correct 4 ms 23132 KB Output is correct
12 Correct 3 ms 23132 KB Output is correct
13 Correct 3 ms 23132 KB Output is correct
14 Correct 3 ms 23384 KB Output is correct
15 Correct 3 ms 22980 KB Output is correct
16 Correct 4 ms 23132 KB Output is correct
17 Correct 4 ms 23132 KB Output is correct
18 Correct 3 ms 23132 KB Output is correct
19 Correct 3 ms 23132 KB Output is correct
20 Correct 3 ms 23132 KB Output is correct
21 Correct 4 ms 25180 KB Output is correct
22 Correct 4 ms 22972 KB Output is correct
23 Correct 3 ms 23196 KB Output is correct
24 Correct 4 ms 25248 KB Output is correct
25 Correct 4 ms 23132 KB Output is correct
26 Correct 4 ms 23132 KB Output is correct
27 Correct 3 ms 23132 KB Output is correct
28 Correct 3 ms 23132 KB Output is correct
29 Correct 4 ms 23128 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 23132 KB Output is correct
2 Correct 3 ms 23132 KB Output is correct
3 Correct 3 ms 23132 KB Output is correct
4 Correct 3 ms 23132 KB Output is correct
5 Correct 3 ms 23132 KB Output is correct
6 Correct 4 ms 23132 KB Output is correct
7 Correct 3 ms 23132 KB Output is correct
8 Correct 4 ms 23208 KB Output is correct
9 Correct 4 ms 23132 KB Output is correct
10 Correct 4 ms 23128 KB Output is correct
11 Correct 4 ms 23132 KB Output is correct
12 Correct 3 ms 23132 KB Output is correct
13 Correct 3 ms 23132 KB Output is correct
14 Correct 3 ms 23384 KB Output is correct
15 Correct 3 ms 22980 KB Output is correct
16 Correct 4 ms 23132 KB Output is correct
17 Correct 4 ms 23132 KB Output is correct
18 Correct 3 ms 23132 KB Output is correct
19 Correct 3 ms 23132 KB Output is correct
20 Correct 3 ms 23132 KB Output is correct
21 Correct 4 ms 25180 KB Output is correct
22 Correct 4 ms 22972 KB Output is correct
23 Correct 3 ms 23196 KB Output is correct
24 Correct 4 ms 25248 KB Output is correct
25 Correct 4 ms 23132 KB Output is correct
26 Correct 4 ms 23132 KB Output is correct
27 Correct 3 ms 23132 KB Output is correct
28 Correct 3 ms 23132 KB Output is correct
29 Correct 4 ms 23128 KB Output is correct
30 Correct 5 ms 23388 KB Output is correct
31 Correct 6 ms 23388 KB Output is correct
32 Correct 7 ms 23388 KB Output is correct
33 Correct 7 ms 23388 KB Output is correct
34 Correct 8 ms 25432 KB Output is correct
35 Correct 4 ms 23348 KB Output is correct
36 Correct 4 ms 23384 KB Output is correct
37 Correct 5 ms 23388 KB Output is correct
38 Correct 6 ms 23428 KB Output is correct
39 Correct 6 ms 23384 KB Output is correct
40 Correct 7 ms 23412 KB Output is correct
41 Correct 5 ms 23384 KB Output is correct
42 Correct 4 ms 25432 KB Output is correct
43 Correct 4 ms 23388 KB Output is correct
44 Correct 6 ms 23388 KB Output is correct
45 Correct 6 ms 23512 KB Output is correct
46 Correct 6 ms 23388 KB Output is correct
47 Correct 4 ms 23388 KB Output is correct
48 Correct 4 ms 23388 KB Output is correct
49 Correct 4 ms 23388 KB Output is correct
50 Correct 7 ms 23496 KB Output is correct
51 Correct 8 ms 23388 KB Output is correct
52 Correct 6 ms 23484 KB Output is correct
53 Correct 5 ms 23388 KB Output is correct
54 Correct 5 ms 23388 KB Output is correct
55 Correct 6 ms 23488 KB Output is correct
56 Correct 4 ms 23132 KB Output is correct
57 Correct 4 ms 23132 KB Output is correct
58 Correct 4 ms 25180 KB Output is correct

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 23132 KB Output is correct
2 Correct 3 ms 22984 KB Output is correct
3 Correct 4 ms 23132 KB Output is correct
4 Correct 192 ms 36752 KB Output is correct
5 Correct 145 ms 39308 KB Output is correct
6 Runtime error 79 ms 79572 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 3 ms 23128 KB Output is correct
2 Runtime error 53 ms 58712 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 3 ms 23132 KB Output is correct
2 Correct 3 ms 23132 KB Output is correct
3 Correct 4 ms 25180 KB Output is correct
4 Correct 296 ms 34916 KB Output is correct
5 Correct 311 ms 35012 KB Output is correct
6 Correct 348 ms 38340 KB Output is correct
7 Correct 372 ms 40068 KB Output is correct
8 Correct 376 ms 40132 KB Output is correct
9 Correct 370 ms 40008 KB Output is correct
10 Correct 381 ms 40132 KB Output is correct
11 Correct 439 ms 40120 KB Output is correct
12 Correct 418 ms 40132 KB Output is correct
13 Correct 396 ms 40012 KB Output is correct
14 Correct 45 ms 28364 KB Output is correct

Subtask #6
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 23132 KB Output is correct
2 Correct 3 ms 23132 KB Output is correct
3 Correct 3 ms 23132 KB Output is correct
4 Correct 3 ms 23132 KB Output is correct
5 Correct 3 ms 23132 KB Output is correct
6 Correct 4 ms 23132 KB Output is correct
7 Correct 3 ms 23132 KB Output is correct
8 Correct 4 ms 23208 KB Output is correct
9 Correct 4 ms 23132 KB Output is correct
10 Correct 4 ms 23128 KB Output is correct
11 Correct 4 ms 23132 KB Output is correct
12 Correct 3 ms 23132 KB Output is correct
13 Correct 3 ms 23132 KB Output is correct
14 Correct 3 ms 23384 KB Output is correct
15 Correct 3 ms 22980 KB Output is correct
16 Correct 4 ms 23132 KB Output is correct
17 Correct 4 ms 23132 KB Output is correct
18 Correct 3 ms 23132 KB Output is correct
19 Correct 3 ms 23132 KB Output is correct
20 Correct 3 ms 23132 KB Output is correct
21 Correct 4 ms 25180 KB Output is correct
22 Correct 4 ms 22972 KB Output is correct
23 Correct 3 ms 23196 KB Output is correct
24 Correct 4 ms 25248 KB Output is correct
25 Correct 4 ms 23132 KB Output is correct
26 Correct 4 ms 23132 KB Output is correct
27 Correct 3 ms 23132 KB Output is correct
28 Correct 3 ms 23132 KB Output is correct
29 Correct 4 ms 23128 KB Output is correct
30 Correct 5 ms 23388 KB Output is correct
31 Correct 6 ms 23388 KB Output is correct
32 Correct 7 ms 23388 KB Output is correct
33 Correct 7 ms 23388 KB Output is correct
34 Correct 8 ms 25432 KB Output is correct
35 Correct 4 ms 23348 KB Output is correct
36 Correct 4 ms 23384 KB Output is correct
37 Correct 5 ms 23388 KB Output is correct
38 Correct 6 ms 23428 KB Output is correct
39 Correct 6 ms 23384 KB Output is correct
40 Correct 7 ms 23412 KB Output is correct
41 Correct 5 ms 23384 KB Output is correct
42 Correct 4 ms 25432 KB Output is correct
43 Correct 4 ms 23388 KB Output is correct
44 Correct 6 ms 23388 KB Output is correct
45 Correct 6 ms 23512 KB Output is correct
46 Correct 6 ms 23388 KB Output is correct
47 Correct 4 ms 23388 KB Output is correct
48 Correct 4 ms 23388 KB Output is correct
49 Correct 4 ms 23388 KB Output is correct
50 Correct 7 ms 23496 KB Output is correct
51 Correct 8 ms 23388 KB Output is correct
52 Correct 6 ms 23484 KB Output is correct
53 Correct 5 ms 23388 KB Output is correct
54 Correct 5 ms 23388 KB Output is correct
55 Correct 6 ms 23488 KB Output is correct
56 Correct 4 ms 23132 KB Output is correct
57 Correct 4 ms 23132 KB Output is correct
58 Correct 4 ms 25180 KB Output is correct
59 Correct 4 ms 23132 KB Output is correct
60 Correct 3 ms 22984 KB Output is correct
61 Correct 4 ms 23132 KB Output is correct
62 Correct 192 ms 36752 KB Output is correct
63 Correct 145 ms 39308 KB Output is correct
64 Runtime error 79 ms 79572 KB Execution killed with signal 11
65 Halted 0 ms 0 KB -