This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
#include "friend.h"
using namespace std;
 
int findSample(int n, int confidence[], int host[], int protocol[]){
    vector<int> c(confidence, confidence + n);
    int ans = 0;
    for (int i = n - 1; i >= 1; i--) {
        if (protocol[i] == 0) {
            c[host[i]] -= c[i];
            ans += c[i];
        }
        if (protocol[i] == 1) {
            c[host[i]] += c[i];
        }
        if (protocol[i] == 2) {
            c[host[i]] = max(c[host[i]], c[i]);
        }
    };
    ans += (c[0] > 0 ? c[0] : 0);
    return ans;
}
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