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input/code.cpp: In function 'int main()':
input/code.cpp:54:19: warning: 'n' is used uninitialized [-Wuninitialized]
   54 |   int path_start[n-1], path_end[n-1], data[n];
      |                  ~^~
input/code.cpp:52:7: note: 'n' declared here
   52 |   int n;
      |       ^

#include <iostream>
#include <vector>
#include <fstream>

using namespace std;

struct Node {
  int id;
  long data;
  vector<Node*> children;
};

Node* create_node(long data, int id)
{
  Node* node = new Node;
  node->data = data;
  node->id = id;
  return node;
}

long eval(Node* root)
{
  if (root->children.size() == 0) return root->data;
  long sum = 0;
  for (Node* child : root->children)
  {
    sum += eval(child);
  }
  return max(root->data, sum);
}

void insert(Node* root, int parent, Node* node)
{
  if (root->id == parent)
  {
    root->children.push_back(node);
  }
  else
  {
    for (Node* child : root->children)
    {
      if (child->id == parent)
      {
        insert(child, parent, node);
      }
    }
  }
}

int main()
{
  int n;

  int path_start[n-1], path_end[n-1], data[n];

  cin >> n;

  for (int i = 0; i < n - 1; i++)
  {
    cin >> path_start[i];
    cin >> path_end[i];
  }

  for (int i = 0; i < n; i++)
  {
    cin >> data[i];
  }

  Node* root = create_node(data[0], 1);

  for (int i = 1; i < n; i++)
  {
    Node* node = create_node(data[i], path_start[i-1]);
    insert(root, path_end[i-1], node);
  }

  cout << eval(root);
}

Test 1

Group: 1, 2

Verdict: RUNTIME ERROR

Test 2

Group: 1, 2

Verdict: RUNTIME ERROR

Test 3

Group: 1, 2

Verdict: RUNTIME ERROR

Test 4

Group: 2

Verdict: RUNTIME ERROR

Test 5

Group: 2

Verdict: RUNTIME ERROR

Test 6

Group: 1, 2

Verdict: RUNTIME ERROR

Test 7

Group: 2

Verdict: RUNTIME ERROR

Test 8

Group: 1, 2

Verdict: RUNTIME ERROR

Test 9

Group: 2

Verdict: RUNTIME ERROR

Test 10

Group: 1, 2

Verdict: RUNTIME ERROR

Test 11

Group: 2

Verdict: RUNTIME ERROR

Test 12

Group: 1, 2

Verdict: RUNTIME ERROR

Test 13

Group: 2

Verdict: RUNTIME ERROR