Submission #31166

#	Time	Username	Problem	Language	Result	Execution time	Memory
31166		pasa3232	Friend (IOI14_friend)	C++14	100 / 100	39 ms	4752 KiB

friend

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

int a,p[100010],q[100010],A[100010],B[100010];
int findSample(int n, int confidence[], int host[], int protocol[]){
    for(int i=0; i<n; i++)p[i]=confidence[i];
    for(int i=1; i<n; i++)A[i]=host[i],B[i]=protocol[i];
    for(int i=n-1;i>0;i--){
        int pj=p[A[i]], qj=q[A[i]], pi=p[i], qi=q[i];
        if(B[i]==0){
            p[A[i]]=pj+qi;
            q[A[i]]=qj+max(pi, qi);
        }
        else if(B[i]==1){
            p[A[i]]=max(pi+pj, max(pi+qj, qi+pj));
            q[A[i]]=qi+qj;
        }
        else{
            p[A[i]]=max(pj+qi, pi+qj);
            q[A[i]]=qi+qj;
        }
    }
    return max(q[0], p[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