Submission #168613

#	Time	Username	Problem	Language	Result	Execution time	Memory
168613		johutha	Friend (IOI14_friend)	C++14	100 / 100	39 ms	4456 KiB

friend

#include "friend.h"
#include <vector>
#include <iostream>
#include <algorithm>

#define int int64_t

using namespace std;

// Find out best sample
signed findSample(signed n, signed confidence[], signed host[], signed protocol[])
{
	vector<int> take;
	for (int i = 0; i < n; i++) take.push_back(confidence[i]);
	vector<int> nottake(n, 0);

	for (int i = n - 1; i > 0; i--)
	{
		int hs = host[i];
		if (protocol[i] == 0)
		{
			take[hs] += nottake[i];
			nottake[hs] += max(take[i], nottake[i]);
		}
		else if (protocol[i] == 1)
		{
			take[hs] = max(take[hs] + max(take[i], nottake[i]), nottake[hs] + take[i]);
			nottake[hs] += nottake[i];
		}
		else
		{
			take[hs] = max(take[hs] + nottake[i], take[i] + nottake[hs]);
			nottake[hs] += nottake[i];
		}
		
	}


	return max(take[0], nottake[0]);
}

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