Submission #31173

#	Time	Username	Problem	Language	Result	Execution time	Memory
31173		cscandkswon	Friend (IOI14_friend)	C++14	100 / 100	53 ms	3972 KiB

friend

#include "friend.h"
#include <bits/stdc++.h>
using namespace std;
const int MAXN=100000;

int p[MAXN], q[MAXN];

int findSample(int n,int confidence[],int host[],int protocol[]){
	int i;
	for(i=0; i<n; i++) p[i]=confidence[i], q[i]=0;
	for(i=n-1; i>0; i--){
		if(protocol[i]==0){
			p[host[i]]=p[host[i]]+q[i];
			q[host[i]]=q[host[i]]+max(p[i], q[i]);
		}
		else if(protocol[i]==1){
			p[host[i]]=max(p[host[i]]+p[i], max(p[host[i]]+q[i], q[host[i]]+p[i]));
			q[host[i]]=q[host[i]]+q[i];
		}
		else{
			p[host[i]]=max(p[host[i]]+q[i], q[host[i]]+p[i]);
			q[host[i]]=q[host[i]]+q[i];
		}
	}
	return max(p[0], q[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