Submission #253356

#	Time	Username	Problem	Language	Result	Execution time	Memory
253356		eohomegrownapps	Friend (IOI14_friend)	C++14	0 / 100	0 ms	384 KiB

friend

#include "friend.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
// Find out best sample

int subtask1(int n,int confidence[],int host[],int protocol[]){
    vector<vector<int>> adjlist(n);
    for (int i = 1; i<n; i++){
        if (protocol[i]==0){
            adjlist[host[i]].push_back(i);
            adjlist[i].push_back(host[i]);
        } else if (protocol[i]==1){
            for (int x : adjlist[host[i]]){
                adjlist[i].push_back(x);
                adjlist[x].push_back(i);
            }
        } else {
            for (int x : adjlist[host[i]]){
                adjlist[i].push_back(x);
                adjlist[x].push_back(i);
            };
            adjlist[host[i]].push_back(i);
            adjlist[i].push_back(host[i]);
        }
    }
    ll mx = 0;
    for (int i = 0; i<(1<<n); i++){
        //check if ok
        bool works = true;
        ll tot = 0;
        for (int j = 0; j<n; j++){
            if ((1<<j)&i){
                mx+=confidence[j];
                for (int k : adjlist[j]){
                    if ((1<<k)&i){
                        works=false;
                        break;
                    }
                }
            }
            if (works==false){
                break;
            }
        }
        if (works==false){
            continue;
        }
        mx=max(mx,tot);
    }
    return mx;
}

int findSample(int n,int confidence[],int host[],int protocol[]){
	if (n<=10){
        return subtask1(n,confidence,host,protocol); 
    }
	return 0;
}

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