Submission #344709

#	Time	Username	Problem	Language	Result	Execution time	Memory
344709		pit4h	Friend (IOI14_friend)	C++14	0 / 100	1093 ms	65540 KiB

friend

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

int findSample(int n, int confidence[], int host[], int protocol[]){
	int ans = 0;
	vector<vector<int>> g(n);
	for(int i=1; i<n; ++i) {
		if(protocol[i]!=1) {
			g[i].push_back(host[i]);
			g[host[i]].push_back(i);
		}
		if(protocol[i]!=0) {
			for(int j: g[host[i]]) {
				g[i].push_back(j);
				g[j].push_back(i);
			}
		}
	}
	for(int mask=0; mask<(1<<n); ++mask) {
		vector<bool> on(n);
		int sum = 0;
		for(int i=0; i<n; ++i) {
			if(mask&(1<<i)) {
				on[i] = 1;	
				sum += confidence[i];
			}
		}
		for(int i=0; i<n; ++i) {
			if(on[i]) {
				for(int j: g[i]) {
					if(on[j]) sum = -1;
				}
			}
		}
		ans = max(ans, sum);
	}
	return ans;
}

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