oj.uz

답안 #682535

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
682535 2023-01-16T13:17:22 Z peijar Designated Cities (JOI19_designated_cities) C++17
100 / 100
 734 ms 96856 KB 
#include <bits/stdc++.h>
#define int long long
using namespace std;

string to_string(string s) { return s; }
template <typename T> string to_string(T v) {
  bool first = true;
  string res = "[";
  for (const auto &x : v) {
    if (!first)
      res += ", ";
    first = false;
    res += to_string(x);
  }
  res += "]";
  return res;
}

void dbg_out() { cout << endl; }
template <typename Head, typename... Tail> void dbg_out(Head H, Tail... T) {
  cout << ' ' << to_string(H);
  dbg_out(T...);
}

#ifdef DEBUG
#define dbg(...) cout << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__)
#else
#define dbg(...)
#endif

const int MAXN = 1e6;

int iDeb[MAXN], iFin[MAXN], lazy[MAXN];
pair<int, int> seg[MAXN];

void pull(int node) { seg[node] = max(seg[2 * node], seg[2 * node + 1]); }

void build(int node, int l, int r) {
  iDeb[node] = l, iFin[node] = r;
  lazy[node] = 0;
  if (l == r) {
    seg[node] = pair(0, l);
    return;
  }

  int m = (l + r) / 2;
  build(2 * node, l, m);
  build(2 * node + 1, m + 1, r);
}

void push(int node) {
  if (!lazy[node])
    return;
  int x = lazy[node];
  lazy[node] = 0;

  seg[node].first += x;
  if (iDeb[node] < iFin[node]) {
    lazy[2 * node] += x, lazy[2 * node + 1] += x;
  }
}

void rangeAdd(int node, int l, int r, int x) {
  push(node);
  if (iDeb[node] > r or iFin[node] < l)
    return;
  if (l <= iDeb[node] and iFin[node] <= r) {
    lazy[node] = x;
    push(node);
    return;
  }
  rangeAdd(2 * node, l, r, x);
  rangeAdd(2 * node + 1, l, r, x);
  pull(node);
}

const int INF = 1e18;
const int MAX = 2e5;

vector<tuple<int, int, int>> adj[MAX];
int tin[MAX], tout[MAX], par[MAXN];
int costDown[MAXN], costUp[MAXN];
int sol[MAXN];
vector<int> order;
int Time;
int nbSommet;

void dfs(int u, int p) {
  par[u] = p;
  tin[u] = Time++;
  order.push_back(u);
  for (auto [v, down, up] : adj[u])
    if (v != p) {
      costDown[v] = up;
      costUp[v] = down;
      dfs(v, u);
    }
  tout[u] = Time;
}

void solve1() {
  int tot = 0;
  for (int i = 1; i < nbSommet; ++i)
    tot += costDown[i];
  auto Solve = [&](auto rec, int u, int p, int curCost) -> void {
    sol[1] = max(sol[1], curCost + tot);
    for (auto [v, a, b] : adj[u])
      if (v != p)
        rec(rec, v, u, curCost + costUp[v] - costDown[v]);
  };
  Solve(Solve, 0, 0, 0);
}

int solve2() {
  if (nbSommet == 2) {
    sol[2] = 0;
    for (int i = 1; i < nbSommet; ++i)
      sol[2] += costDown[i] + costUp[i];
    return 0;
  }
  int root = 0;
  while (adj[root].size() == 1)
    ++root;
  dfs(root, root);
  tuple<int, int, int> ret(0, 0, 0);
  int tot = 0;
  for (int i = 0; i < nbSommet; ++i)
    if (i != root)
      tot += costDown[i];

  auto Solve = [&](auto rec, int u, int p, int curDiff,
                   int curDepth) -> pair<int, int> {
    vector<pair<int, int>> choix;
    for (auto [v, a, b] : adj[u])
      if (v != p)
        choix.push_back(rec(rec, v, u, curDiff + costUp[v] - costDown[v],
                            curDepth + costUp[v]));
    sort(choix.rbegin(), choix.rend());
    if (choix.size() > 1) {
      auto [c1, s] = choix[0];
      auto [c2, t] = choix[1];
      ret = max(ret, make_tuple(tot + c1 + c2 - 2 * curDepth + curDiff, s, t));
    }
    if (choix.empty())
      return pair(curDepth, u);
    return choix.front();
  };
  Solve(Solve, root, root, 0, 0);
  auto [s, u, v] = ret;
  dbg(s, u, v);
  sol[2] = s;
  return u;
}

void solve(int root) {
  order.clear();
  Time = 0;

  dfs(root, root);
  dbg(order);

  build(1, 0, Time - 1);
  int tot = 0;

  for (int i = 0; i < nbSommet; ++i)
    if (i != root)
      tot += costDown[i];
  vector<bool> cleared(nbSommet, false);
  cleared[root] = true;

  auto Clear = [&](auto rec, int u) -> void {
    if (cleared[u])
      return;
    cleared[u] = true;
    rangeAdd(1, tin[u], tout[u] - 1, -costUp[u]);
    rec(rec, par[u]);
  };

  for (int u = 0; u < nbSommet; ++u)
    if (u != root)
      rangeAdd(1, tin[u], tout[u] - 1, costUp[u]);

  int cur = tot;
  for (int i = 2; i <= nbSommet; ++i) {
    auto [toAdd, t] = seg[1];
    cur += toAdd;
    sol[i] = cur;
    Clear(Clear, order[t]);
  }
}

signed main(void) {
  ios_base::sync_with_stdio(false);
  cin.tie(0);

  cin >> nbSommet;
  int tot = 0;

  for (int i = 1; i < nbSommet; ++i) {
    int u, v, C, D;
    cin >> u >> v >> C >> D;
    --u, --v;
    adj[u].emplace_back(v, C, D);
    adj[v].emplace_back(u, D, C);
    tot += C + D;
  }

  dfs(0, 0);

  solve1();
  int r = solve2();
  solve(r);

  int Q;
  cin >> Q;
  while (Q--) {
    int E;
    cin >> E;
    cout << tot - sol[E] << '\n';
  }
}

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 3 ms 5076 KB Output is correct
3 Correct 3 ms 5084 KB Output is correct
4 Correct 2 ms 5076 KB Output is correct
5 Correct 2 ms 5076 KB Output is correct
6 Correct 2 ms 5036 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 2 ms 5076 KB Output is correct
9 Correct 3 ms 5076 KB Output is correct
10 Correct 3 ms 5028 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct

Subtask #2
7.0 / 7.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 630 ms 51484 KB Output is correct
3 Correct 622 ms 84532 KB Output is correct
4 Correct 561 ms 51332 KB Output is correct
5 Correct 669 ms 52592 KB Output is correct
6 Correct 694 ms 56132 KB Output is correct
7 Correct 566 ms 50156 KB Output is correct
8 Correct 724 ms 85424 KB Output is correct
9 Correct 527 ms 53232 KB Output is correct

Subtask #3
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5076 KB Output is correct
2 Correct 650 ms 51312 KB Output is correct
3 Correct 579 ms 90088 KB Output is correct
4 Correct 594 ms 51340 KB Output is correct
5 Correct 609 ms 52600 KB Output is correct
6 Correct 681 ms 56808 KB Output is correct
7 Correct 508 ms 53376 KB Output is correct
8 Correct 694 ms 72528 KB Output is correct
9 Correct 546 ms 53080 KB Output is correct

Subtask #4
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 3 ms 5076 KB Output is correct
3 Correct 3 ms 5084 KB Output is correct
4 Correct 2 ms 5076 KB Output is correct
5 Correct 2 ms 5076 KB Output is correct
6 Correct 2 ms 5036 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 2 ms 5076 KB Output is correct
9 Correct 3 ms 5076 KB Output is correct
10 Correct 3 ms 5028 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5028 KB Output is correct
13 Correct 6 ms 5572 KB Output is correct
14 Correct 5 ms 5844 KB Output is correct
15 Correct 6 ms 5580 KB Output is correct
16 Correct 9 ms 5616 KB Output is correct
17 Correct 6 ms 5628 KB Output is correct
18 Correct 6 ms 5560 KB Output is correct
19 Correct 6 ms 5588 KB Output is correct
20 Correct 6 ms 5588 KB Output is correct
21 Correct 6 ms 5628 KB Output is correct
22 Correct 5 ms 5560 KB Output is correct
23 Correct 6 ms 5588 KB Output is correct
24 Correct 5 ms 5624 KB Output is correct
25 Correct 6 ms 5972 KB Output is correct
26 Correct 6 ms 5588 KB Output is correct

Subtask #5
17.0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 630 ms 51484 KB Output is correct
3 Correct 622 ms 84532 KB Output is correct
4 Correct 561 ms 51332 KB Output is correct
5 Correct 669 ms 52592 KB Output is correct
6 Correct 694 ms 56132 KB Output is correct
7 Correct 566 ms 50156 KB Output is correct
8 Correct 724 ms 85424 KB Output is correct
9 Correct 527 ms 53232 KB Output is correct
10 Correct 2 ms 5076 KB Output is correct
11 Correct 650 ms 51312 KB Output is correct
12 Correct 579 ms 90088 KB Output is correct
13 Correct 594 ms 51340 KB Output is correct
14 Correct 609 ms 52600 KB Output is correct
15 Correct 681 ms 56808 KB Output is correct
16 Correct 508 ms 53376 KB Output is correct
17 Correct 694 ms 72528 KB Output is correct
18 Correct 546 ms 53080 KB Output is correct
19 Correct 2 ms 5076 KB Output is correct
20 Correct 643 ms 51328 KB Output is correct
21 Correct 635 ms 96856 KB Output is correct
22 Correct 644 ms 56432 KB Output is correct
23 Correct 653 ms 58132 KB Output is correct
24 Correct 619 ms 56804 KB Output is correct
25 Correct 656 ms 58092 KB Output is correct
26 Correct 634 ms 56936 KB Output is correct
27 Correct 655 ms 58448 KB Output is correct
28 Correct 691 ms 61580 KB Output is correct
29 Correct 656 ms 58576 KB Output is correct
30 Correct 628 ms 57904 KB Output is correct
31 Correct 547 ms 56392 KB Output is correct
32 Correct 722 ms 80652 KB Output is correct
33 Correct 538 ms 59692 KB Output is correct

Subtask #6
44.0 / 44.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 5076 KB Output is correct
2 Correct 3 ms 5076 KB Output is correct
3 Correct 3 ms 5084 KB Output is correct
4 Correct 2 ms 5076 KB Output is correct
5 Correct 2 ms 5076 KB Output is correct
6 Correct 2 ms 5036 KB Output is correct
7 Correct 3 ms 5076 KB Output is correct
8 Correct 2 ms 5076 KB Output is correct
9 Correct 3 ms 5076 KB Output is correct
10 Correct 3 ms 5028 KB Output is correct
11 Correct 3 ms 5076 KB Output is correct
12 Correct 3 ms 5076 KB Output is correct
13 Correct 630 ms 51484 KB Output is correct
14 Correct 622 ms 84532 KB Output is correct
15 Correct 561 ms 51332 KB Output is correct
16 Correct 669 ms 52592 KB Output is correct
17 Correct 694 ms 56132 KB Output is correct
18 Correct 566 ms 50156 KB Output is correct
19 Correct 724 ms 85424 KB Output is correct
20 Correct 527 ms 53232 KB Output is correct
21 Correct 2 ms 5076 KB Output is correct
22 Correct 650 ms 51312 KB Output is correct
23 Correct 579 ms 90088 KB Output is correct
24 Correct 594 ms 51340 KB Output is correct
25 Correct 609 ms 52600 KB Output is correct
26 Correct 681 ms 56808 KB Output is correct
27 Correct 508 ms 53376 KB Output is correct
28 Correct 694 ms 72528 KB Output is correct
29 Correct 546 ms 53080 KB Output is correct
30 Correct 3 ms 5028 KB Output is correct
31 Correct 6 ms 5572 KB Output is correct
32 Correct 5 ms 5844 KB Output is correct
33 Correct 6 ms 5580 KB Output is correct
34 Correct 9 ms 5616 KB Output is correct
35 Correct 6 ms 5628 KB Output is correct
36 Correct 6 ms 5560 KB Output is correct
37 Correct 6 ms 5588 KB Output is correct
38 Correct 6 ms 5588 KB Output is correct
39 Correct 6 ms 5628 KB Output is correct
40 Correct 5 ms 5560 KB Output is correct
41 Correct 6 ms 5588 KB Output is correct
42 Correct 5 ms 5624 KB Output is correct
43 Correct 6 ms 5972 KB Output is correct
44 Correct 6 ms 5588 KB Output is correct
45 Correct 2 ms 5076 KB Output is correct
46 Correct 643 ms 51328 KB Output is correct
47 Correct 635 ms 96856 KB Output is correct
48 Correct 644 ms 56432 KB Output is correct
49 Correct 653 ms 58132 KB Output is correct
50 Correct 619 ms 56804 KB Output is correct
51 Correct 656 ms 58092 KB Output is correct
52 Correct 634 ms 56936 KB Output is correct
53 Correct 655 ms 58448 KB Output is correct
54 Correct 691 ms 61580 KB Output is correct
55 Correct 656 ms 58576 KB Output is correct
56 Correct 628 ms 57904 KB Output is correct
57 Correct 547 ms 56392 KB Output is correct
58 Correct 722 ms 80652 KB Output is correct
59 Correct 538 ms 59692 KB Output is correct
60 Correct 3 ms 5076 KB Output is correct
61 Correct 682 ms 60536 KB Output is correct
62 Correct 652 ms 92792 KB Output is correct
63 Correct 667 ms 59048 KB Output is correct
64 Correct 664 ms 60736 KB Output is correct
65 Correct 644 ms 59320 KB Output is correct
66 Correct 658 ms 60704 KB Output is correct
67 Correct 653 ms 59348 KB Output is correct
68 Correct 635 ms 61184 KB Output is correct
69 Correct 679 ms 64404 KB Output is correct
70 Correct 658 ms 61268 KB Output is correct
71 Correct 595 ms 60664 KB Output is correct
72 Correct 597 ms 59804 KB Output is correct
73 Correct 734 ms 79660 KB Output is correct
74 Correct 546 ms 63828 KB Output is correct