#include "job.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long long ld;
const int MAXN = 2e5 + 25;
//sum * d[i] + (sum - u[i]) * d[j] < sum * d[j] + (sum - u[j]) * d[i]
//- u[i] * d[j] < -u[j] * d[i]
//u[i] * d[j] > u[j] * d[i]
//u[i] / d[i] > u[j] / d[j] when i is more optimal than j
ll scheduling_cost(vector<int> p, vector<int> u, vector<int> d) {
vector <int> adj[(int)p.size()];
for (int i = 0; i < (int)p.size(); i++) {
if (p[i] != -1) {
adj[p[i]].push_back(i);
}
}
vector <int> ee;
ee.push_back(0);
vector <int> ans;
while (!ee.empty()) {
int k = ee[0];
ee.erase(ee.begin());
ans.push_back(k);
for (auto i : adj[k]) {
ee.push_back(i);
}
if (!adj[k].empty()) {
sort(ee.begin(), ee.end(), [&] (auto i, auto j) {
return (ll)u[i] * (ll)d[j] > (ll)u[j] * (ll)d[i];
});
}
}
ll sum = 0, ret = 0;
for (auto i : ans) {
sum += u[i];
}
for (auto i : ans) {
ret += sum * (ll)d[i];
sum -= u[i];
}
return ret;
}
