oj.uz

Submission #1015102

# Submission time Handle Problem Language Result Execution time Memory
1015102 2024-07-06T05:51:46 Z vjudge1 Fireworks (APIO16_fireworks) C++17
26 / 100
 14 ms 1176 KB 
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
const int N = 3e2+6;
const ll inf = 1e18;
int n, m;
ll dp[N][N];
vector<pair<int,int> > child[N];

void subtask1()
{
  sort(child[1].begin(), child[1].end());
  ll suf = 0, prf = 0;
  for(auto [w, u] : child[1])
    suf += w;

  ll ans = inf;
  for(int i = 0; i < child[1].size(); i++)
    {
      ll w = child[1][i].first, rem = child[1].size() - i;
      ans = min(ans, i * w - prf + suf - rem * w);
      prf += w;
      suf -= w;
    }
  cout << ans << endl;
}

void dfs(int v)
{
  if(child[v].empty())
    {
      for(int i = 1; i < N; i ++)
	dp[v][i] = inf;
      return;
    }

  for(auto [w, u] : child[v])
    {
      dfs(u);
      for(int i = 0; i < N; i ++)
	{
	  ll ans = N * N;
	  for(int j = 0; j <= i; j++)
	    ans = min(ans, abs(w - j) + dp[u][i  - j]);
	  dp[v][i] += ans;
	  dp[v][i] = min(dp[v][i], inf);
	}
	
    }
  
}

void subtask2()
{
  dfs(1);
  for(int i = 0; i < N; i ++)
    dp[1][0] = min(dp[1][i], dp[1][0]);
  cout << dp[1][0] << endl;
}

int main()
{
  cin >> n >> m;
  for(int i = 2; i <= n + m; i ++)
    {
      int p, w;
      cin >> p >> w;
      child[p].push_back({w, i});
    }

  if(n == 1)
    subtask1();
  else
    subtask2();
  return 0;
}

Compilation message

fireworks.cpp: In function 'void subtask1()':
fireworks.cpp:20:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |   for(int i = 0; i < child[1].size(); i++)
      |                  ~~^~~~~~~~~~~~~~~~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 2 ms 348 KB Output is correct
3 Correct 3 ms 604 KB Output is correct
4 Correct 4 ms 604 KB Output is correct
5 Correct 7 ms 860 KB Output is correct
6 Correct 6 ms 728 KB Output is correct
7 Correct 8 ms 600 KB Output is correct
8 Correct 8 ms 856 KB Output is correct
9 Correct 9 ms 860 KB Output is correct
10 Correct 12 ms 772 KB Output is correct
11 Correct 11 ms 860 KB Output is correct
12 Correct 12 ms 860 KB Output is correct
13 Correct 14 ms 908 KB Output is correct
14 Correct 14 ms 1068 KB Output is correct
15 Correct 14 ms 1176 KB Output is correct
16 Correct 14 ms 1176 KB Output is correct
17 Correct 14 ms 1112 KB Output is correct
18 Correct 14 ms 1116 KB Output is correct
19 Correct 14 ms 1116 KB Output is correct

Subtask #3
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 2 ms 348 KB Output is correct
13 Correct 3 ms 604 KB Output is correct
14 Correct 4 ms 604 KB Output is correct
15 Correct 7 ms 860 KB Output is correct
16 Correct 6 ms 728 KB Output is correct
17 Correct 8 ms 600 KB Output is correct
18 Correct 8 ms 856 KB Output is correct
19 Correct 9 ms 860 KB Output is correct
20 Correct 12 ms 772 KB Output is correct
21 Correct 11 ms 860 KB Output is correct
22 Correct 12 ms 860 KB Output is correct
23 Correct 14 ms 908 KB Output is correct
24 Correct 14 ms 1068 KB Output is correct
25 Correct 14 ms 1176 KB Output is correct
26 Correct 14 ms 1176 KB Output is correct
27 Correct 14 ms 1112 KB Output is correct
28 Correct 14 ms 1116 KB Output is correct
29 Correct 14 ms 1116 KB Output is correct
30 Runtime error 1 ms 856 KB Execution killed with signal 11
31 Halted 0 ms 0 KB -

Subtask #4
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 2 ms 348 KB Output is correct
13 Correct 3 ms 604 KB Output is correct
14 Correct 4 ms 604 KB Output is correct
15 Correct 7 ms 860 KB Output is correct
16 Correct 6 ms 728 KB Output is correct
17 Correct 8 ms 600 KB Output is correct
18 Correct 8 ms 856 KB Output is correct
19 Correct 9 ms 860 KB Output is correct
20 Correct 12 ms 772 KB Output is correct
21 Correct 11 ms 860 KB Output is correct
22 Correct 12 ms 860 KB Output is correct
23 Correct 14 ms 908 KB Output is correct
24 Correct 14 ms 1068 KB Output is correct
25 Correct 14 ms 1176 KB Output is correct
26 Correct 14 ms 1176 KB Output is correct
27 Correct 14 ms 1112 KB Output is correct
28 Correct 14 ms 1116 KB Output is correct
29 Correct 14 ms 1116 KB Output is correct
30 Runtime error 1 ms 856 KB Execution killed with signal 11
31 Halted 0 ms 0 KB -