Submission #1042744

#	Time	Username	Problem	Language	Result	Execution time	Memory
1042744		jer033	Friend (IOI14_friend)	C++17	100 / 100	14 ms	3240 KiB

friend

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

int findSample(int n,int confidence[],int host[],int protocol[]){
	vector<int> do_not_use(n, 0);
    vector<int> do_use(n, 0);
    for (int i=0; i<n; i++)
        do_use[i] = confidence[i];
    for (int i=n-1; i>=1; i--)
    {
        int h = host[i];
        int p = protocol[i];
        int dnuh = do_not_use[h];
        int duh = do_use[h];
        if (p == 1)
        {
            do_not_use[h] = dnuh+do_not_use[i];
            do_use[h] = duh+do_use[i];
        }
        else if (p == 2)
        {
            do_not_use[h] = dnuh + do_not_use[i];
            do_use[h] = max(dnuh + do_use[i], duh + do_not_use[i]);
        }
        else
        {
            do_not_use[h] = dnuh + do_use[i];
            do_use[h] = duh + do_not_use[i];
            do_use[h] = max(do_use[h], do_not_use[h]);
        }
    }
    return max(do_not_use[0], do_use[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