Submission #589366

#	Time	Username	Problem	Language	Result	Execution time	Memory
589366		yutabi	Friend (IOI14_friend)	C++14	27 / 100	27 ms	1396 KiB

friend

#include "friend.h"


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


#define pb push_back


int subtask1(int n,int confidence[],int host[],int protocol[])
{
	bool graph[n][n];

	for(int i=0;i<n;i++)
	{
		for(int j=0;j<n;j++)
		{
			graph[i][j]=0;
		}
	}

	for(int i=1;i<n;i++)
	{
		if(protocol[i]!=0)
		{
			for(int j=0;j<n;j++)
			{
				if(graph[host[i]][j])
				{
					graph[j][i]=graph[i][j]=1;
				}
			}
		}

		if(protocol[i]!=1)
		{
			graph[host[i]][i]=graph[i][host[i]]=1;
		}
	}

	int ans=0;

	for(int i=0;i<1<<n;i++)
	{
		vector <int> nums;

		int curr=0;

		for(int j=0,k=i;k;j++,k/=2)
		{
			if(k%2)
			{
				nums.pb(j);

				curr+=confidence[j];
			}
		}

		bool flag=0;

		for(int j=0;j<nums.size();j++)
		{
			for(int k=0;k<nums.size();k++)
			{
				if(graph[nums[j]][nums[k]])
				{
					flag=1;
				}
			}
		}

		if(!flag)
		{
			ans=max(ans,curr);
		}
	}

	return ans;
}

int subtask2(int n,int confidence[],int host[],int protocol[])
{
	int ans=0;

	for(int i=0;i<n;i++)
	{
		ans+=confidence[i];
	}

	return ans;
}

int subtask3(int n,int confidence[],int host[],int protocol[])
{
	int ans=0;

	for(int i=0;i<n;i++)
	{
		ans=max(ans,confidence[i]);
	}

	return ans;
}

int subtask4(int n,int confidence[],int host[],int protocol[])
{
	return -1;
}

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

	if(protocol[1]==1)
	{
		return subtask2(n,confidence,host,protocol);
	}

	if(protocol[1]==2)
	{
		return subtask3(n,confidence,host,protocol);
	}

	if(protocol[1]==0)
	{
		return subtask4(n,confidence,host,protocol);
	}


	bool oopsie=0;

	assert(oopsie);

	return 0;
}

Compilation message (stderr)

friend.cpp: In function 'int subtask1(int, int*, int*, int*)':
friend.cpp:62:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   62 |   for(int j=0;j<nums.size();j++)
      |               ~^~~~~~~~~~~~
friend.cpp:64:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |    for(int k=0;k<nums.size();k++)
      |                ~^~~~~~~~~~~~

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