Submission #1017381

#	Time	Username	Problem	Language	Result	Execution time	Memory
1017381		serkanrashid	Friend (IOI14_friend)	C++14	0 / 100	2 ms	1372 KiB

friend

#include "friend.h"
#include <bits/stdc++.h>
#define endl "\n"

using namespace std;

const int maxn = 1024;

vector<int>g[maxn];
int used[maxn];
int sum[3],con[maxn];

void dfs(int beg)
{
    for(int nb : g[beg])
    {
        if(used[nb]) continue;
        used[nb] = 3 - used[beg];
        sum[used[nb]] += con[nb];
        dfs(nb);
    }
}

int findSample(int n, int confidence[], int host[], int protocol[])
{
    for(int i = 0; i < n; i++) con[i] = confidence[i];
    for(int i = 1; i < n; i++)
    {
        if(protocol[i]==0)
        {
            g[host[i]].push_back(i);
            g[i].push_back(host[i]);
        }
        if(protocol[i]==1)
        {
            for(int nb : g[host[i]])
            {
                g[nb].push_back(i);
                g[i].push_back(nb);
            }
        }
        if(protocol[i]==2)
        {
            for(int nb : g[host[i]])
            {
                g[nb].push_back(i);
                g[i].push_back(nb);
            }
            g[host[i]].push_back(i);
            g[i].push_back(host[i]);
        }
    }

    used[0] = 1;
    sum[1] = confidence[0];
    dfs(0);
    return max(sum[1],sum[2]);
}

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