Submission #284565

#	Time	Username	Problem	Language	Result	Execution time	Memory
284565		ScarletS	Friend (IOI14_friend)	C++17	11 / 100	1091 ms	11896 KiB

friend

#include <bits/stdc++.h>
#define ll long long
#define sz(x) (int)(x).size()
using namespace std;

set<int> edges[1000];

int findSample(int n, int confidence[], int host[], int protocol[])
{
    int ans=0,cur;
    for (int i=1;i<n;++i)
    {
        if (protocol[i]==0)
        {
            edges[host[i]].insert(i);
            edges[i].insert(host[i]);
        }
        else if (protocol[i]==1)
            for (int j : edges[host[i]])
            {
                edges[i].insert(j);
                edges[j].insert(i);
            }
        else
        {
            for (int j : edges[host[i]])
            {
                edges[i].insert(j);
                edges[j].insert(i);
            }
            edges[host[i]].insert(i);
            edges[i].insert(host[i]);
        }
    }
    bool ok;
    for (int i=1;i<(1<<n);++i)
    {
        ok=1;cur=0;
        for (int j=0;j<n;++j)
        {
            if ((1<<j)&i)
            {
                cur+=confidence[j];
                for (int k=0;k<n;++k)
                    if ((1<<k)&i)
                        if (edges[j].find(k)!=edges[j].end())
                            ok=0;
            }
        }
        if (ok)
            ans=max(ans,cur);
    }
    return ans;
}

/**int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0);
    int n;
    cin>>n;
    int c[n];
    for (int i=0;i<n;++i)
        cin>>c[i];
    int h[n];
    for (int i=1;i<n;++i)
        cin>>h[i];
    int p[n];
    for (int i=1;i<n;++i)
        cin>>p[i];
    cout<<findSample(n,c,h,p);
    return 0;
}**/

• Subtask 1: 11 / 11
• Subtask 2: 0 / 8
• Subtask 3: 0 / 8
• Subtask 4: 0 / 19
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31