Laskettelukeskus

#include <cmath>
#include <iostream>
#include <queue>

int main() {
    long rinteet;
    std::cin >> rinteet;

    std::vector<std::pair<long, long>> paths;
    std::vector<std::pair<long, long>> huiput;

    for (long i = 0; i < rinteet-1; ++i) {
        long n1;
        long n2;

        std::cin >> n1 >> n2;

        paths.push_back(std::pair(n2-1, n1-1));
    }

    for (long i = 0; i < rinteet; ++i) {
        long n;
        std::cin >> n;

        huiput.push_back(std::pair(n, 0));
    }

    for (auto path : paths) {
        long idx = path.second;

        long value = std::max(huiput[path.first].first, huiput[path.first].second);

        while (huiput[idx].second < 0) {
            value = std::max(value, huiput[idx].first);

            idx = std::abs(huiput[idx].second);
        }


        huiput[idx].second += value;
        huiput[path.first].second = -idx;
    }

    std::cout << std::max(huiput.front().second, huiput.front().first);
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: WRONG ANSWER

Test 3

Group: 1, 2

Verdict: WRONG ANSWER

Test 4

Group: 2

Verdict: WRONG ANSWER

Test 5

Group: 2

Verdict: WRONG ANSWER

Test 6

Group: 1, 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: ACCEPTED

Test 8

Group: 1, 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: ACCEPTED

Test 10

Group: 1, 2

Verdict: WRONG ANSWER

Test 11

Group: 2

Verdict: WRONG ANSWER

Test 12

Group: 1, 2

Verdict: WRONG ANSWER

Test 13

Group: 2

Verdict: WRONG ANSWER