Submission #422211

#	Time	Username	Problem	Language	Result	Execution time	Memory
422211		dreezy	Friend (IOI14_friend)	C++17	11 / 100	1036 ms	65540 KiB

friend

#include <bits/stdc++.h>
#include "friend.h"
using namespace std;


/*******************/
// Find out best sample
#define pi pair<int,int>
#define ll long long
#define f first
#define s second
#define pb push_back

vector<vector<int>> dp;
vector<set<int>> graph;
vector<int> conf;

 int works(set<int> on){
	int ans = 0;
	for(int a : on){
		ans+= conf[a];
		for(int b : on){
			if(graph[a].find(b)!= graph[a].end()) return 0;
		}
	}
	
	
	
	return ans;
}

int findSample(int n,int confidence[],int host[],int protocol[]){
	dp.clear();
	graph.clear();
	conf.clear();
	conf.assign(n, 0);
	dp.assign(n, vector<int>(2, -1));
	graph.assign(n, set<int>());
	
	for(int i =0; i<n; i++){
		conf[i] = confidence[i];
	}
	for(int i =1; i<n; i++){
		if(protocol[i] == 0){
			graph[host[i]].insert(i);
			graph[i].insert(host[i]);
			
		}
		else if(protocol[i] == 1){
			for(int adj : graph[host[i]]){
				graph[adj].insert(i);
				graph[i].insert(adj);
			}
		}else{
			for(int adj : graph[host[i]]){
				graph[adj].insert(i);
				graph[i].insert(adj);
			}
			graph[host[i]].insert(i);
			graph[i].insert(host[i]);
			
		}
	}
	int ans =0;
	
	for(int mask = 1; mask <(1<<n); mask++){
		set<int> att;
			for(int i =0;i <n; i++)
			{
			if(mask & (1<<i))	att.insert(i);
			}
			
			ans = max(ans, works(att));
	}
	
	return ans;
}

/*******************/

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