Laskettelukeskus

#include <iostream>

using namespace std;

int t = 0;

struct rin
{
    rin* up = nullptr;
    int left = 0;
    int nleft = 0;
    bool down = false;

    void upd(int x)
    {
        if(!up)
            t += x;

        left -= x;
        if (up)
            up->upd(x);
    }

    void upd2(int x)
    {
        if (!up)
            t += x;
        else
        {
            nleft = x;

            int dx = x;

            if (up->nleft > 0)
            {
                dx = min(0, x - up->nleft);
                up->nleft = max(0, up->nleft - x);
            }

            left -= x;
            if (dx)
                up->upd2(dx);
        }
    }
};

int main()
{
    rin rinL[1002];
    
    int n;
    cin >> n;

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

    for (int i = 1; i < n + 1; i++)
    {
        int a;
        cin >> a;
        rinL[i].left = a;
    }

    for (int i = 1; i < n + 1; i++)
    {
        auto& r = rinL[i];
        if (r.down == false)
            r.upd(r.left);
    }

    for (int i = 1; i < n + 1; i++)
    {
        auto& r = rinL[i];
        if (r.left > 0)
            r.upd(r.left);
    }

    cout << t;

    return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 1, 2

Verdict: WRONG ANSWER

Test 3

Group: 1, 2

Verdict: ACCEPTED

Test 4

Group: 2

Verdict: RUNTIME ERROR

Test 5

Group: 2

Verdict: RUNTIME ERROR

Test 6

Group: 1, 2

Verdict: ACCEPTED

Test 7

Group: 2

Verdict: RUNTIME ERROR

Test 8

Group: 1, 2

Verdict: ACCEPTED

Test 9

Group: 2

Verdict: RUNTIME ERROR

Test 10

Group: 1, 2

Verdict: WRONG ANSWER

Test 11

Group: 2

Verdict: RUNTIME ERROR

Test 12

Group: 1, 2

Verdict: ACCEPTED

Test 13

Group: 2

Verdict: RUNTIME ERROR