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Submission #238252

# Submission time Handle Problem Language Result Execution time Memory
238252 2020-06-10T13:16:23 Z my99n Fireworks (APIO16_fireworks) C++14
100 / 100
 299 ms 61584 KB 
#include<bits/stdc++.h>
using namespace std;

struct slope {
  priority_queue<long long> cp;
  long long initslope;
  long long inity;
  slope () {
    cp = priority_queue<long long>();
    initslope = 0;
    inity = 0;
  }
};

void merge (slope &a, slope &b) {
  if (a.cp.size() < b.cp.size()) swap(a, b);
  a.initslope += b.initslope;
  a.inity += b.inity;
  while (!b.cp.empty()) {
    a.cp.push(b.cp.top());
    b.cp.pop();
  }
}

vector<int> g[300100];
long long weight[300100];

slope dfs (int u) { // rightmost slope always 1
  slope now;
  if (g[u].size() == 0) {
    now.inity = weight[u];
    now.initslope = -1;
    now.cp.push(weight[u]);
    now.cp.push(weight[u]);
    return now;
  }
  for (auto x : g[u]) {
    slope child = dfs(x);
    merge(now, child);
  }
  // rightmost slope of now is g[u].size()
  for (int i = 1; i < g[u].size(); i++) now.cp.pop();
  // right most slope is now 1
  // shift graph with weight[u]
  now.inity += weight[u];
  auto a = now.cp.top(); now.cp.pop();
  auto b = now.cp.top(); now.cp.pop();
  now.cp.push(a+weight[u]);
  now.cp.push(b+weight[u]);
  return now;
}

int main(){
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);

  int n, m; cin >> n >> m;
  for (int i = 2; i <= n+m; i++) {
    int a, b; cin >> a >> b;
    g[a].push_back(i);
    weight[i] = b;
  }

  slope res = dfs(1);
  long long ans = res.inity;
  res.cp.pop();
  long long last = res.cp.top();
  res.cp.pop();
  int i = 1;
  while (!res.cp.empty()) {
    ans -= i*(last - res.cp.top());
    last = res.cp.top();
    res.cp.pop();
    i++;
  }
  ans -= i*last;

  cout << ans << endl;
  return 0;
}

Compilation message

fireworks.cpp: In function 'slope dfs(int)':
fireworks.cpp:42:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int i = 1; i < g[u].size(); i++) now.cp.pop();
                   ~~^~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7424 KB Output is correct
2 Correct 10 ms 7424 KB Output is correct
3 Correct 10 ms 7424 KB Output is correct
4 Correct 10 ms 7424 KB Output is correct
5 Correct 9 ms 7424 KB Output is correct
6 Correct 9 ms 7424 KB Output is correct
7 Correct 8 ms 7424 KB Output is correct
8 Correct 8 ms 7424 KB Output is correct
9 Correct 9 ms 7424 KB Output is correct
10 Correct 8 ms 7424 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7424 KB Output is correct
2 Correct 10 ms 7424 KB Output is correct
3 Correct 11 ms 7424 KB Output is correct
4 Correct 8 ms 7424 KB Output is correct
5 Correct 10 ms 7424 KB Output is correct
6 Correct 8 ms 7424 KB Output is correct
7 Correct 8 ms 7424 KB Output is correct
8 Correct 9 ms 7424 KB Output is correct
9 Correct 9 ms 7424 KB Output is correct
10 Correct 9 ms 7424 KB Output is correct
11 Correct 10 ms 7424 KB Output is correct
12 Correct 10 ms 7424 KB Output is correct
13 Correct 9 ms 7424 KB Output is correct
14 Correct 9 ms 7424 KB Output is correct
15 Correct 10 ms 7424 KB Output is correct
16 Correct 10 ms 7424 KB Output is correct
17 Correct 10 ms 7424 KB Output is correct
18 Correct 9 ms 7424 KB Output is correct
19 Correct 8 ms 7424 KB Output is correct

Subtask #3
29.0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7424 KB Output is correct
2 Correct 10 ms 7424 KB Output is correct
3 Correct 10 ms 7424 KB Output is correct
4 Correct 10 ms 7424 KB Output is correct
5 Correct 9 ms 7424 KB Output is correct
6 Correct 9 ms 7424 KB Output is correct
7 Correct 8 ms 7424 KB Output is correct
8 Correct 8 ms 7424 KB Output is correct
9 Correct 9 ms 7424 KB Output is correct
10 Correct 8 ms 7424 KB Output is correct
11 Correct 10 ms 7424 KB Output is correct
12 Correct 10 ms 7424 KB Output is correct
13 Correct 11 ms 7424 KB Output is correct
14 Correct 8 ms 7424 KB Output is correct
15 Correct 10 ms 7424 KB Output is correct
16 Correct 8 ms 7424 KB Output is correct
17 Correct 8 ms 7424 KB Output is correct
18 Correct 9 ms 7424 KB Output is correct
19 Correct 9 ms 7424 KB Output is correct
20 Correct 9 ms 7424 KB Output is correct
21 Correct 10 ms 7424 KB Output is correct
22 Correct 10 ms 7424 KB Output is correct
23 Correct 9 ms 7424 KB Output is correct
24 Correct 9 ms 7424 KB Output is correct
25 Correct 10 ms 7424 KB Output is correct
26 Correct 10 ms 7424 KB Output is correct
27 Correct 10 ms 7424 KB Output is correct
28 Correct 9 ms 7424 KB Output is correct
29 Correct 8 ms 7424 KB Output is correct
30 Correct 9 ms 7424 KB Output is correct
31 Correct 9 ms 7424 KB Output is correct
32 Correct 9 ms 7424 KB Output is correct
33 Correct 10 ms 7552 KB Output is correct
34 Correct 12 ms 7552 KB Output is correct
35 Correct 12 ms 7680 KB Output is correct
36 Correct 11 ms 7552 KB Output is correct
37 Correct 12 ms 7680 KB Output is correct
38 Correct 11 ms 7680 KB Output is correct
39 Correct 15 ms 7680 KB Output is correct
40 Correct 12 ms 8320 KB Output is correct
41 Correct 11 ms 8320 KB Output is correct
42 Correct 12 ms 7680 KB Output is correct
43 Correct 13 ms 7936 KB Output is correct
44 Correct 13 ms 7808 KB Output is correct
45 Correct 13 ms 7808 KB Output is correct
46 Correct 14 ms 7680 KB Output is correct
47 Correct 14 ms 7680 KB Output is correct
48 Correct 13 ms 7680 KB Output is correct
49 Correct 12 ms 7680 KB Output is correct
50 Correct 13 ms 7680 KB Output is correct
51 Correct 11 ms 7552 KB Output is correct
52 Correct 12 ms 7680 KB Output is correct
53 Correct 13 ms 7680 KB Output is correct
54 Correct 13 ms 7680 KB Output is correct

Subtask #4
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 7424 KB Output is correct
2 Correct 10 ms 7424 KB Output is correct
3 Correct 10 ms 7424 KB Output is correct
4 Correct 10 ms 7424 KB Output is correct
5 Correct 9 ms 7424 KB Output is correct
6 Correct 9 ms 7424 KB Output is correct
7 Correct 8 ms 7424 KB Output is correct
8 Correct 8 ms 7424 KB Output is correct
9 Correct 9 ms 7424 KB Output is correct
10 Correct 8 ms 7424 KB Output is correct
11 Correct 10 ms 7424 KB Output is correct
12 Correct 10 ms 7424 KB Output is correct
13 Correct 11 ms 7424 KB Output is correct
14 Correct 8 ms 7424 KB Output is correct
15 Correct 10 ms 7424 KB Output is correct
16 Correct 8 ms 7424 KB Output is correct
17 Correct 8 ms 7424 KB Output is correct
18 Correct 9 ms 7424 KB Output is correct
19 Correct 9 ms 7424 KB Output is correct
20 Correct 9 ms 7424 KB Output is correct
21 Correct 10 ms 7424 KB Output is correct
22 Correct 10 ms 7424 KB Output is correct
23 Correct 9 ms 7424 KB Output is correct
24 Correct 9 ms 7424 KB Output is correct
25 Correct 10 ms 7424 KB Output is correct
26 Correct 10 ms 7424 KB Output is correct
27 Correct 10 ms 7424 KB Output is correct
28 Correct 9 ms 7424 KB Output is correct
29 Correct 8 ms 7424 KB Output is correct
30 Correct 9 ms 7424 KB Output is correct
31 Correct 9 ms 7424 KB Output is correct
32 Correct 9 ms 7424 KB Output is correct
33 Correct 10 ms 7552 KB Output is correct
34 Correct 12 ms 7552 KB Output is correct
35 Correct 12 ms 7680 KB Output is correct
36 Correct 11 ms 7552 KB Output is correct
37 Correct 12 ms 7680 KB Output is correct
38 Correct 11 ms 7680 KB Output is correct
39 Correct 15 ms 7680 KB Output is correct
40 Correct 12 ms 8320 KB Output is correct
41 Correct 11 ms 8320 KB Output is correct
42 Correct 12 ms 7680 KB Output is correct
43 Correct 13 ms 7936 KB Output is correct
44 Correct 13 ms 7808 KB Output is correct
45 Correct 13 ms 7808 KB Output is correct
46 Correct 14 ms 7680 KB Output is correct
47 Correct 14 ms 7680 KB Output is correct
48 Correct 13 ms 7680 KB Output is correct
49 Correct 12 ms 7680 KB Output is correct
50 Correct 13 ms 7680 KB Output is correct
51 Correct 11 ms 7552 KB Output is correct
52 Correct 12 ms 7680 KB Output is correct
53 Correct 13 ms 7680 KB Output is correct
54 Correct 13 ms 7680 KB Output is correct
55 Correct 19 ms 8064 KB Output is correct
56 Correct 52 ms 9976 KB Output is correct
57 Correct 89 ms 11656 KB Output is correct
58 Correct 88 ms 13004 KB Output is correct
59 Correct 133 ms 14636 KB Output is correct
60 Correct 154 ms 16120 KB Output is correct
61 Correct 174 ms 17840 KB Output is correct
62 Correct 259 ms 18652 KB Output is correct
63 Correct 299 ms 20464 KB Output is correct
64 Correct 241 ms 20952 KB Output is correct
65 Correct 134 ms 61560 KB Output is correct
66 Correct 144 ms 61584 KB Output is correct
67 Correct 142 ms 24184 KB Output is correct
68 Correct 212 ms 40168 KB Output is correct
69 Correct 265 ms 36972 KB Output is correct
70 Correct 247 ms 37028 KB Output is correct
71 Correct 239 ms 20412 KB Output is correct
72 Correct 245 ms 20272 KB Output is correct
73 Correct 220 ms 19564 KB Output is correct
74 Correct 212 ms 19672 KB Output is correct
75 Correct 217 ms 19376 KB Output is correct
76 Correct 224 ms 19404 KB Output is correct
77 Correct 222 ms 20176 KB Output is correct
78 Correct 218 ms 20044 KB Output is correct
79 Correct 246 ms 22752 KB Output is correct