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Submission #559176

# Submission time Handle Problem Language Result Execution time Memory
559176 2022-05-09T13:06:52 Z acm Road Closures (APIO21_roads) C++14
31 / 100
 2000 ms 25804 KB 
#include <bits/stdc++.h>
#define FOR(i, l, r) for (int i = (l); i <= (r); ++i)
#define REP(i, l, r) for (int i = (l); i < (r); ++i)
#define FORD(i, r, l) for (int i = (r); i >= (l); --i)
#define REPD(i, r, l) for (int i = (r)-1; i >= (l); --i)
#define pb(x) push_back(x)
#define ll long long
#define pii pair<int, int>
using namespace std;
const int N = 1e5 + 5, Ns4 = 200005;
int n;
long long ans[N];
long long dpx[N], val[N];
int sz[Ns4];
long long dd[Ns4][2];
vector<pii> S[N];

void DFS(int u, int p, int max_sz) {
  int now_sz = min(sz[u], max_sz), w = 0;
  vector<int> Q;
  long long sum = 0, pre_sum = 0;
  for (auto [c, v] : S[u])
    if (v != p) {
      DFS(v, u, max_sz);
      long long xx = dd[v][1] + c;
      long long yy = dd[v][0];
      sum += xx;
      if (yy - xx < 0)
        Q.push_back(yy - xx);
      else
        w++;
    }
  for (int i = 0; i <= min(w, 1); i++) Q.pb(0);
  now_sz = min(now_sz, (int)Q.size());
  pre_sum = 1e15;
  if (now_sz && Q.size() > 2000) {
    nth_element(Q.begin(), Q.begin() + now_sz - 1, Q.end());
    int alta = Q[now_sz - 1];
    int x = now_sz;
    for (auto X : Q) {
      if (X < alta) {
        x--;
        pre_sum = sum;
        sum += min(0, X);
      }
    }
    for (auto X : Q) {
      if (X == alta && x) {
        x--;
        pre_sum = sum;
        sum += min(0, X);
      }
    }
    Q.clear();
  } else {
    sort(Q.begin(), Q.end());

    pre_sum = 1e15;
    REP(i, 0, now_sz) {
      pre_sum = sum;
      sum += min(0, Q[i]);
    }
    Q.clear();
  }
  if (now_sz < max_sz) pre_sum = sum;
  dd[u][0] = pre_sum;
  dd[u][1] = sum;
}
ll calc(int i) {
  DFS(0, 0, i);
  return ans[i] = dd[0][1];
}
void dnc(int l = 1, int r = n - 2, ll L = ans[n - 1], ll R = ans[0]) {
  if (l > r) return;
  if (L == R) {
    for (int i = l; i <= r; i++) ans[i] = L;
    return;
  }
  int tm = (l + r) / 2;
  calc(tm);
  dnc(l, tm - 1, ans[tm], R);
  dnc(tm + 1, r, L, ans[tm]);
}
void sub34() {
  REP(i, 0, n) {
    sz[i] = S[i].size() - 1;
    if (i == 0) ++sz[i];
  }
  int x = 0;
  for (int i = 0; i < __lg(n) + 1; i++) {
    int y = min(x + (1 << i), n - 1);
    dnc(x, y, calc(y), calc(x));
    if (y == n - 1) break;
    x = y + 1;
  }
}

vector<long long> minimum_closure_costs(int N, vector<int> U, vector<int> V,
                                        vector<int> W) {
  n = N;
  REP(i, 0, n - 1) {
    S[U[i]].emplace_back(W[i], V[i]);
    S[V[i]].emplace_back(W[i], U[i]);
  }
  sub34();
  vector<long long> ret(n);
  REP(i, 0, n) ret[i] = ans[i];
  return ret;
}

Compilation message

roads.cpp: In function 'void DFS(int, int, int)':
roads.cpp:22:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   22 |   for (auto [c, v] : S[u])
      |             ^

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 253 ms 2772 KB Output is correct
3 Correct 282 ms 2852 KB Output is correct
4 Correct 176 ms 2856 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 3 ms 2644 KB Output is correct
7 Correct 4 ms 2644 KB Output is correct
8 Correct 142 ms 2772 KB Output is correct
9 Correct 206 ms 2772 KB Output is correct
10 Correct 3 ms 2644 KB Output is correct
11 Correct 3 ms 2644 KB Output is correct
12 Execution timed out 2087 ms 8212 KB Time limit exceeded
13 Halted 0 ms 0 KB -

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 302 ms 21824 KB Output is correct
3 Correct 359 ms 24220 KB Output is correct
4 Correct 360 ms 25804 KB Output is correct
5 Correct 370 ms 25740 KB Output is correct
6 Correct 5 ms 3028 KB Output is correct
7 Correct 6 ms 3028 KB Output is correct
8 Correct 6 ms 3072 KB Output is correct
9 Correct 2 ms 2704 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 196 ms 16464 KB Output is correct
13 Correct 347 ms 25732 KB Output is correct
14 Correct 1 ms 2644 KB Output is correct
15 Correct 320 ms 23464 KB Output is correct
16 Correct 357 ms 25664 KB Output is correct

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 3 ms 2644 KB Output is correct
6 Correct 3 ms 2644 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 3 ms 2644 KB Output is correct
14 Correct 4 ms 2644 KB Output is correct
15 Correct 3 ms 2644 KB Output is correct
16 Correct 2 ms 2644 KB Output is correct
17 Correct 2 ms 2644 KB Output is correct
18 Correct 2 ms 2644 KB Output is correct
19 Correct 3 ms 2644 KB Output is correct
20 Correct 3 ms 2644 KB Output is correct
21 Correct 1 ms 2644 KB Output is correct

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2644 KB Output is correct
2 Correct 2 ms 2644 KB Output is correct
3 Correct 1 ms 2644 KB Output is correct
4 Correct 2 ms 2644 KB Output is correct
5 Correct 3 ms 2644 KB Output is correct
6 Correct 3 ms 2644 KB Output is correct
7 Correct 2 ms 2644 KB Output is correct
8 Correct 2 ms 2644 KB Output is correct
9 Correct 2 ms 2644 KB Output is correct
10 Correct 2 ms 2644 KB Output is correct
11 Correct 2 ms 2644 KB Output is correct
12 Correct 2 ms 2644 KB Output is correct
13 Correct 3 ms 2644 KB Output is correct
14 Correct 4 ms 2644 KB Output is correct
15 Correct 3 ms 2644 KB Output is correct
16 Correct 2 ms 2644 KB Output is correct
17 Correct 2 ms 2644 KB Output is correct
18 Correct 2 ms 2644 KB Output is correct
19 Correct 3 ms 2644 KB Output is correct
20 Correct 3 ms 2644 KB Output is correct
21 Correct 1 ms 2644 KB Output is correct
22 Correct 1 ms 2644 KB Output is correct
23 Correct 6 ms 2772 KB Output is correct
24 Correct 11 ms 2772 KB Output is correct
25 Correct 9 ms 2864 KB Output is correct
26 Correct 14 ms 2772 KB Output is correct
27 Correct 46 ms 2864 KB Output is correct
28 Correct 33 ms 2772 KB Output is correct
29 Correct 9 ms 2772 KB Output is correct
30 Correct 12 ms 2848 KB Output is correct
31 Correct 12 ms 2772 KB Output is correct
32 Correct 93 ms 2852 KB Output is correct
33 Correct 5 ms 3036 KB Output is correct
34 Correct 6 ms 3028 KB Output is correct
35 Correct 5 ms 3028 KB Output is correct
36 Correct 257 ms 2836 KB Output is correct
37 Correct 270 ms 2856 KB Output is correct
38 Correct 184 ms 2900 KB Output is correct
39 Correct 1 ms 2644 KB Output is correct
40 Correct 2 ms 2644 KB Output is correct
41 Correct 2 ms 2644 KB Output is correct
42 Correct 2 ms 2644 KB Output is correct
43 Correct 2 ms 2644 KB Output is correct
44 Correct 2 ms 2644 KB Output is correct
45 Correct 2 ms 2644 KB Output is correct
46 Correct 2 ms 2644 KB Output is correct
47 Correct 2 ms 2644 KB Output is correct
48 Correct 2 ms 2644 KB Output is correct
49 Correct 2 ms 2644 KB Output is correct
50 Correct 3 ms 2644 KB Output is correct
51 Correct 4 ms 2696 KB Output is correct
52 Correct 4 ms 2696 KB Output is correct
53 Correct 9 ms 2772 KB Output is correct
54 Correct 8 ms 2884 KB Output is correct
55 Correct 54 ms 2872 KB Output is correct
56 Correct 161 ms 2940 KB Output is correct
57 Correct 218 ms 2860 KB Output is correct
58 Correct 2 ms 2644 KB Output is correct
59 Correct 2 ms 2644 KB Output is correct
60 Correct 2 ms 2672 KB Output is correct
61 Correct 5 ms 2696 KB Output is correct
62 Correct 3 ms 2644 KB Output is correct
63 Correct 1 ms 2644 KB Output is correct
64 Correct 7 ms 2772 KB Output is correct
65 Correct 12 ms 2852 KB Output is correct
66 Correct 12 ms 2848 KB Output is correct
67 Correct 116 ms 2852 KB Output is correct
68 Correct 9 ms 2772 KB Output is correct

Subtask #5
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 956 ms 12004 KB Output is correct
2 Correct 918 ms 11748 KB Output is correct
3 Execution timed out 2082 ms 11392 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #6
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 956 ms 12004 KB Output is correct
2 Correct 918 ms 11748 KB Output is correct
3 Execution timed out 2082 ms 11392 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #7
0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2644 KB Output is correct
2 Correct 253 ms 2772 KB Output is correct
3 Correct 282 ms 2852 KB Output is correct
4 Correct 176 ms 2856 KB Output is correct
5 Correct 2 ms 2644 KB Output is correct
6 Correct 3 ms 2644 KB Output is correct
7 Correct 4 ms 2644 KB Output is correct
8 Correct 142 ms 2772 KB Output is correct
9 Correct 206 ms 2772 KB Output is correct
10 Correct 3 ms 2644 KB Output is correct
11 Correct 3 ms 2644 KB Output is correct
12 Execution timed out 2087 ms 8212 KB Time limit exceeded
13 Halted 0 ms 0 KB -