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Submission #154096

# Submission time Handle Problem Language Result Execution time Memory
154096 2019-09-18T11:10:05 Z arnold518 Fireworks (APIO16_fireworks) C++14
26 / 100
 13 ms 8568 KB 
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 3e5;

int N, M, C[MAXN+10];
vector<int> adj[MAXN+10];
ll ans=1e18;

struct Func
{
    ll slope, cut;
    priority_queue<ll> PQ;

    Func() : slope(0), cut(0) {}

    void propa(ll x)
    {
        int i, j;
        ll a, b;
        while(!PQ.empty() && slope+(int)PQ.size()>-1)
        {
            if(slope+PQ.size()==0) a=PQ.top();
            if(slope+PQ.size()==1) b=PQ.top();
            PQ.pop();
        }
        PQ.push(a+x); PQ.push(b+x);
        cut+=x;
    }
};

Func *dfs(int now)
{
    int i, j;
    Func *ret=new Func;
    if(adj[now].empty())
    {
        ret->slope=-1;
        ret->cut=C[now];
        ret->PQ.push(C[now]);
        ret->PQ.push(C[now]);
        return ret;
    }

    for(int nxt : adj[now])
    {
        Func *t=dfs(nxt);
        if(t->PQ.size()>ret->PQ.size()) swap(t, ret);
        ret->slope+=t->slope; ret->cut+=t->cut;
        while(!t->PQ.empty()) ret->PQ.push(t->PQ.top()), t->PQ.pop();
    }

    if(now!=1) ret->propa(C[now]);
    return ret;
}

int main()
{
    int i, j;

    scanf("%d%d", &N, &M);
    for(i=2; i<=N+M; i++)
    {
        int p;
        scanf("%d%d", &p, &C[i]);
        adj[p].push_back(i);
    }

    Func *fin=dfs(1);
    vector<int> V;
    while(!fin->PQ.empty()) V.push_back(fin->PQ.top()), fin->PQ.pop(); V.push_back(0);
    reverse(V.begin(), V.end());

    for(i=1; i<V.size(); i++)
    {
        ans=min(ans, fin->cut+fin->slope*(V[i]-V[i-1]));
        fin->cut+=fin->slope*(V[i]-V[i-1]);
        fin->slope++;
    }
    printf("%lld", ans);
}

Compilation message

fireworks.cpp: In member function 'void Func::propa(ll)':
fireworks.cpp:23:13: warning: unused variable 'i' [-Wunused-variable]
         int i, j;
             ^
fireworks.cpp:23:16: warning: unused variable 'j' [-Wunused-variable]
         int i, j;
                ^
fireworks.cpp: In function 'Func* dfs(int)':
fireworks.cpp:38:9: warning: unused variable 'i' [-Wunused-variable]
     int i, j;
         ^
fireworks.cpp:38:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^
fireworks.cpp: In function 'int main()':
fireworks.cpp:75:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
     while(!fin->PQ.empty()) V.push_back(fin->PQ.top()), fin->PQ.pop(); V.push_back(0);
     ^~~~~
fireworks.cpp:75:72: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
     while(!fin->PQ.empty()) V.push_back(fin->PQ.top()), fin->PQ.pop(); V.push_back(0);
                                                                        ^
fireworks.cpp:78:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(i=1; i<V.size(); i++)
              ~^~~~~~~~~
fireworks.cpp:63:12: warning: unused variable 'j' [-Wunused-variable]
     int i, j;
            ^
fireworks.cpp:65:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &N, &M);
     ~~~~~^~~~~~~~~~~~~~~~
fireworks.cpp:69:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &p, &C[i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~
fireworks.cpp: In function 'Func* dfs(int)':
fireworks.cpp:31:32: warning: 'b' may be used uninitialized in this function [-Wmaybe-uninitialized]
         PQ.push(a+x); PQ.push(b+x);
                               ~^~
fireworks.cpp:24:15: note: 'b' was declared here
         ll a, b;
               ^
fireworks.cpp:31:18: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]
         PQ.push(a+x); PQ.push(b+x);
                 ~^~
fireworks.cpp:24:12: note: 'a' was declared here
         ll a, b;
            ^

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7416 KB Output is correct
2 Correct 10 ms 7288 KB Output is correct
3 Correct 8 ms 7420 KB Output is correct
4 Correct 8 ms 7416 KB Output is correct
5 Correct 8 ms 7416 KB Output is correct
6 Correct 8 ms 7416 KB Output is correct
7 Correct 8 ms 7416 KB Output is correct
8 Correct 9 ms 7416 KB Output is correct
9 Correct 8 ms 7416 KB Output is correct
10 Correct 8 ms 7416 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 8 ms 7288 KB Output is correct
2 Correct 9 ms 7416 KB Output is correct
3 Correct 8 ms 7288 KB Output is correct
4 Correct 10 ms 7416 KB Output is correct
5 Correct 10 ms 7416 KB Output is correct
6 Correct 10 ms 7416 KB Output is correct
7 Correct 10 ms 7416 KB Output is correct
8 Correct 8 ms 7416 KB Output is correct
9 Correct 10 ms 7416 KB Output is correct
10 Correct 9 ms 7416 KB Output is correct
11 Correct 8 ms 7416 KB Output is correct
12 Correct 8 ms 7416 KB Output is correct
13 Correct 8 ms 7324 KB Output is correct
14 Correct 10 ms 7416 KB Output is correct
15 Correct 9 ms 7416 KB Output is correct
16 Correct 10 ms 7416 KB Output is correct
17 Correct 9 ms 7416 KB Output is correct
18 Correct 9 ms 7416 KB Output is correct
19 Correct 9 ms 7416 KB Output is correct

Subtask #3
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7416 KB Output is correct
2 Correct 10 ms 7288 KB Output is correct
3 Correct 8 ms 7420 KB Output is correct
4 Correct 8 ms 7416 KB Output is correct
5 Correct 8 ms 7416 KB Output is correct
6 Correct 8 ms 7416 KB Output is correct
7 Correct 8 ms 7416 KB Output is correct
8 Correct 9 ms 7416 KB Output is correct
9 Correct 8 ms 7416 KB Output is correct
10 Correct 8 ms 7416 KB Output is correct
11 Correct 8 ms 7288 KB Output is correct
12 Correct 9 ms 7416 KB Output is correct
13 Correct 8 ms 7288 KB Output is correct
14 Correct 10 ms 7416 KB Output is correct
15 Correct 10 ms 7416 KB Output is correct
16 Correct 10 ms 7416 KB Output is correct
17 Correct 10 ms 7416 KB Output is correct
18 Correct 8 ms 7416 KB Output is correct
19 Correct 10 ms 7416 KB Output is correct
20 Correct 9 ms 7416 KB Output is correct
21 Correct 8 ms 7416 KB Output is correct
22 Correct 8 ms 7416 KB Output is correct
23 Correct 8 ms 7324 KB Output is correct
24 Correct 10 ms 7416 KB Output is correct
25 Correct 9 ms 7416 KB Output is correct
26 Correct 10 ms 7416 KB Output is correct
27 Correct 9 ms 7416 KB Output is correct
28 Correct 9 ms 7416 KB Output is correct
29 Correct 9 ms 7416 KB Output is correct
30 Correct 9 ms 7416 KB Output is correct
31 Correct 11 ms 7544 KB Output is correct
32 Correct 10 ms 7544 KB Output is correct
33 Correct 11 ms 7672 KB Output is correct
34 Correct 11 ms 7672 KB Output is correct
35 Correct 12 ms 7792 KB Output is correct
36 Correct 12 ms 7928 KB Output is correct
37 Correct 13 ms 7972 KB Output is correct
38 Correct 12 ms 7932 KB Output is correct
39 Correct 12 ms 8056 KB Output is correct
40 Incorrect 11 ms 8568 KB Output isn't correct
41 Halted 0 ms 0 KB -

Subtask #4
0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 9 ms 7416 KB Output is correct
2 Correct 10 ms 7288 KB Output is correct
3 Correct 8 ms 7420 KB Output is correct
4 Correct 8 ms 7416 KB Output is correct
5 Correct 8 ms 7416 KB Output is correct
6 Correct 8 ms 7416 KB Output is correct
7 Correct 8 ms 7416 KB Output is correct
8 Correct 9 ms 7416 KB Output is correct
9 Correct 8 ms 7416 KB Output is correct
10 Correct 8 ms 7416 KB Output is correct
11 Correct 8 ms 7288 KB Output is correct
12 Correct 9 ms 7416 KB Output is correct
13 Correct 8 ms 7288 KB Output is correct
14 Correct 10 ms 7416 KB Output is correct
15 Correct 10 ms 7416 KB Output is correct
16 Correct 10 ms 7416 KB Output is correct
17 Correct 10 ms 7416 KB Output is correct
18 Correct 8 ms 7416 KB Output is correct
19 Correct 10 ms 7416 KB Output is correct
20 Correct 9 ms 7416 KB Output is correct
21 Correct 8 ms 7416 KB Output is correct
22 Correct 8 ms 7416 KB Output is correct
23 Correct 8 ms 7324 KB Output is correct
24 Correct 10 ms 7416 KB Output is correct
25 Correct 9 ms 7416 KB Output is correct
26 Correct 10 ms 7416 KB Output is correct
27 Correct 9 ms 7416 KB Output is correct
28 Correct 9 ms 7416 KB Output is correct
29 Correct 9 ms 7416 KB Output is correct
30 Correct 9 ms 7416 KB Output is correct
31 Correct 11 ms 7544 KB Output is correct
32 Correct 10 ms 7544 KB Output is correct
33 Correct 11 ms 7672 KB Output is correct
34 Correct 11 ms 7672 KB Output is correct
35 Correct 12 ms 7792 KB Output is correct
36 Correct 12 ms 7928 KB Output is correct
37 Correct 13 ms 7972 KB Output is correct
38 Correct 12 ms 7932 KB Output is correct
39 Correct 12 ms 8056 KB Output is correct
40 Incorrect 11 ms 8568 KB Output isn't correct
41 Halted 0 ms 0 KB -