Laskettelukeskus

#include <iostream>
#include <vector>
#include <stdint.h>
#include <cassert>

class Node
{
public:
    Node(uint64_t val) : m_val(val) {}

    void add_child(Node* child)
    {
        assert(child);
        m_children.push_back(child);
    }

    uint64_t evaluate()
    {
        uint64_t child_sum = 0u;
        for (Node* child : m_children)
        {
            child_sum += child->evaluate();
        }
        
        return std::max(child_sum, m_val);
    }
 
private:
    uint64_t m_val;
    std::vector<Node*> m_children;
};
 
std::vector<Node*> create_nodes(uint32_t amount, const std::vector<uint64_t>& values)
{
    std::vector<Node*> output;
    for (uint32_t i = 0; i < amount; i++)
    {
        output.push_back(new Node(values.at(i)));
    }

    return output;
}
 
int main()
{
    // inputs
    uint32_t num_slopes;
    std::cin >> num_slopes;
 
    std::vector<std::vector<uint32_t> > connections(num_slopes - 1);
    for (uint32_t i = 0; i < num_slopes - 1; i++)
    {
        for (uint32_t j = 0; j < 2; j++)
        {
            uint32_t input;
            std::cin >> input;
            connections.at(i).push_back(input);
        }
    }
 
    std::vector<uint64_t> times_per_slope(num_slopes);
    for (uint32_t i = 0; i < num_slopes; i++)
    {
        std::cin >> times_per_slope.at(i);
    }
 
    // nodes
    std::vector<Node*> nodes = create_nodes(num_slopes, times_per_slope);
    for (uint32_t i = 0; i < connections.size(); i++)
    {
        const uint32_t from = connections[i][0];
        const uint32_t to = connections[i][1];
 
        nodes[from - 1]->add_child(nodes[to - 1]);
    }
 
    //output
    std::cout << nodes.at(0)->evaluate() << std::endl;
 
	return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: ACCEPTED

Test 3

Group: 1, 2

Verdict: ACCEPTED

Test 4

Group: 2

Verdict: ACCEPTED

Test 5

Group: 2

Verdict: ACCEPTED

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: ACCEPTED

Test 11

Group: 2

Verdict: ACCEPTED

Test 12

Group: 1, 2

Verdict: ACCEPTED

Test 13

Group: 2

Verdict: ACCEPTED