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input/code.cpp: In function 'int main()':
input/code.cpp:34:12: warning: 'i' may be used uninitialized [-Wmaybe-uninitialized]
   34 |   for (int i; i < count; i++) {
      |            ^
input/code.cpp:29:3: warning: 'i' may be used uninitialized in this function [-Wmaybe-uninitialized]
   29 |   for (int i; i < (count - 1); i++) {
      |   ^~~

#include <string>
#include <array>
#include <iostream>
#include <vector>

std::array<int, 100000> requireds;
std::array<std::vector<int>, 100000> nodes;

int calculate(int cur_node) {
  std::vector<int> children = nodes[cur_node];
  int t = 0;
  for (int c : children) {
    t += calculate(c);
  }
  if (t > requireds[cur_node - 1]) {
    return t;
  } else {
    return requireds[cur_node - 1];
  }
}

int main() {
  int count;
  std::cin >> count;

  int temp1;
  int temp2;

  for (int i; i < (count - 1); i++) {
    std::cin >> temp1 >> temp2;
    nodes[temp1].push_back(temp2);
  }

  for (int i; i < count; i++) {
    std::cin >> requireds[i];
  }

  std::cout << calculate(1);
}
/*
$nodes = Hash.new { Array.new }

while rows.length > 0
  a, b = rows.shift
  $nodes[a] |= [b]
end

def calculate(current)
  children = $nodes[current]
  #puts "#{current}, #{children}"
  if !children.empty?
    t = 0
    children.each { |c| t += calculate(c) }
    if t >= $requireds[current - 1]
      return t
    end
  end
  return $requireds[current - 1] # shift
end

count = gets.chomp.to_i
 
rows = []
(count - 1).times do
  rows << gets.chomp.split(" ").map(&:to_i)
end

$requireds = gets.chomp.split(" ").map(&:to_i)


# hash stores parent
# parent through child until child has no child, then take thing and return with alg
puts calculate(1)
*/

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: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_array_new_length'
  what():  std:...

Test 5

Group: 2

Verdict: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_alloc'
  what():  std::bad_alloc

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: RUNTIME ERROR

terminate called after throwing an instance of 'std::bad_array_new_length'
  what():  std:...

Test 12

Group: 1, 2

Verdict: ACCEPTED

Test 13

Group: 2

Verdict: WRONG ANSWER