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input/code.cpp: In function 'int main()':
input/code.cpp:30:23: warning: comparison of integer expressions of different signedness: 'int' and 'uint64_t' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for (int i = 0; i < n - 1; i++)
      |                     ~~^~~~~~~
input/code.cpp:37:23: warning: comparison of integer expressions of different signedness: 'int' and 'uint64_t' {aka 'long unsigned int'} [-Wsign-compare]
   37 |     for (int i = 1; i < n + 1; i++)
      |                     ~~^~~~~~~

#include <iostream>
#include <vector>

using namespace std;


struct rin
{
    vector<rin*> down;
    uint64_t l = 0;

    uint64_t upd()
    {
        uint64_t t = 0;
        for (auto r : down)
            t += r->upd();

        return max(t, l);
    }
};

int main()
{
    vector<rin> rinL;
    rinL.resize(100002);
    
    uint64_t n;
    cin >> n;

    for (int i = 0; i < n - 1; i++)
    {
        uint64_t a, b;
        cin >> a >> b;
        rinL[a].down.push_back(& rinL[b]);
    }

    for (int i = 1; i < n + 1; i++)
    {
        uint64_t a;
        cin >> a;

        rinL[i].l = a;
    }

    cout << rinL[1].upd();

    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