5
27468 7465 74275 40573 40155
112071 76270 244461 264202 132397
1 777133331
2 107454154
3 652330694
4 792720519
 5
78188 56310 79021 70050 65217
115040 5149 128449 98357 36580
1 451393770
2 574046602
3 590130784
4 112514248
 7
1 1 1 1 1 1 1
1 3000000000 3000000000 3000000000 1000000000 1000000000 1000000000
1 1000000000
1 1000000000
1 1000000000
1 1000000000
1 1000000000
1 1000000000
 10
2 8 6 1 2 7 6 9 2 8
4 9 4 3 5 2 9 3 7 3
1 8
2 8
3 8
4 10
5 1
6 4
7 3
8 10
9 2
 11
1 1 1 1 1 1 1 1 1 1 1
1 1000000001 1000000001 1000000001 1000000001 1000000001 1000000001 1000000001 1000000001 1000000001 1000000001
1 1000000000
1 1000000000
1 1000000000
1 1000000000
1 1000000000
1 1000000000
1 1000000000
1 1000000000
1 1000000000
1 1000000000
 5
2 1 1 2 3
1 2 2 2 1
1 2
1 3
2 4
1 4

NO
 NO
 NO
 YES
 NO
 NO

#include <bits/stdc++.h>
using namespace std;
int n;
long long a[100000], b[100000];
vector<pair<int, long long>> connections[100000];
long long needed(int node) {
  long long res = a[node] - b[node];
  for (const pair<int, int> edge : connections[node]) {
    long long curr = needed(edge.first);
    if (curr > 0) curr *= edge.second;
    res -= curr;
  }
  return res;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cin >> n;
  for (int i = 0; i < (n); i++) cin >> a[i];
  for (int i = 0; i < (n); i++) cin >> b[i];
  for (int i = 0; i < (n - 1); i++) {
    int x;
    long long k;
    cin >> x >> k;
    connections[--x].push_back(make_pair(i + 1, k));
  }
  if (needed(0) <= 0)
    cout << "YES\n";
  else
    cout << "NO\n";
  return 0;
}
