oj.uz

Submission #68909

# Submission time Handle Problem Language Result Execution time Memory
68909 2018-08-19T08:20:06 Z Vahan Bosses (BOI16_bosses) C++17
67 / 100
 1500 ms 1968 KB 
#include<iostream>
#include<vector>
#include<deque>
#include<cstdio>
using namespace std;
vector<int> r[20000],g[20000];
deque<int> q;
int n,pp,u[100000],pat=-1;
int dfs(int v,int p)
{
    int x=1;
    for(int i=0;i<r[v].size();i++)
    {
        int to=r[v][i];
        if(to==p)
            continue;
        x+=dfs(to,v);
    }
    pp+=x;
    return x;
}
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        int a;
        scanf("%d",&a);
        for(int j=1;j<=a;j++)
        {
            int b;
            scanf("%d",&b);
            if(i!=b)
                g[b].push_back(i);
        }
    }
    for(int i=1;i<=n;i++)
    {
        q.push_back(i);
        u[i]=1;
        int t=0;
        while(!q.empty())
        {
            int v=q.front();
            q.pop_front();
            t++;
            for(int j=0;j<g[v].size();j++)
            {
                int to=g[v][j];
                if(u[to]==0)
                {
                    u[to]=1;
                    q.push_back(to);
                    r[v].push_back(to);
                }
            }
        }
        if(t==n)
        {
            pp=0;
            dfs(i,-1);
            if(pp<pat || pat==-1)
                pat=pp;
        }
        else
            q.clear();
        for(int j=1;j<=n;j++)
        {
            u[j]=0;
            r[j].clear();
        }
    }
    cout<<pat<<endl;
    return 0;
}

Compilation message

bosses.cpp: In function 'int dfs(int, int)':
bosses.cpp:12:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<r[v].size();i++)
                 ~^~~~~~~~~~~~
bosses.cpp: In function 'int main()':
bosses.cpp:47:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int j=0;j<g[v].size();j++)
                         ~^~~~~~~~~~~~
bosses.cpp:28:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a);
         ~~~~~^~~~~~~~~
bosses.cpp:32:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d",&b);
             ~~~~~^~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1272 KB Output is correct
2 Correct 4 ms 1360 KB Output is correct
3 Correct 4 ms 1360 KB Output is correct
4 Correct 4 ms 1444 KB Output is correct
5 Correct 4 ms 1532 KB Output is correct
6 Correct 3 ms 1532 KB Output is correct

Subtask #2
45.0 / 45.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1272 KB Output is correct
2 Correct 4 ms 1360 KB Output is correct
3 Correct 4 ms 1360 KB Output is correct
4 Correct 4 ms 1444 KB Output is correct
5 Correct 4 ms 1532 KB Output is correct
6 Correct 3 ms 1532 KB Output is correct
7 Correct 3 ms 1532 KB Output is correct
8 Correct 3 ms 1532 KB Output is correct
9 Correct 4 ms 1532 KB Output is correct
10 Correct 4 ms 1532 KB Output is correct
11 Correct 3 ms 1532 KB Output is correct

Subtask #3
0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 1272 KB Output is correct
2 Correct 4 ms 1360 KB Output is correct
3 Correct 4 ms 1360 KB Output is correct
4 Correct 4 ms 1444 KB Output is correct
5 Correct 4 ms 1532 KB Output is correct
6 Correct 3 ms 1532 KB Output is correct
7 Correct 3 ms 1532 KB Output is correct
8 Correct 3 ms 1532 KB Output is correct
9 Correct 4 ms 1532 KB Output is correct
10 Correct 4 ms 1532 KB Output is correct
11 Correct 3 ms 1532 KB Output is correct
12 Correct 10 ms 1644 KB Output is correct
13 Correct 8 ms 1644 KB Output is correct
14 Correct 240 ms 1724 KB Output is correct
15 Correct 51 ms 1724 KB Output is correct
16 Correct 848 ms 1968 KB Output is correct
17 Execution timed out 1559 ms 1968 KB Time limit exceeded
18 Halted 0 ms 0 KB -