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 main(int argc, char *argv[]) {
  cin.sync_with_stdio(false);
  int n;
  cin >> n;
  vector<long long> a(n), b(n);
  for (int i = 0; i < n; i++) {
    cin >> b[i];
  }
  for (int i = 0; i < n; i++) {
    cin >> a[i];
  }
  vector<long long> c(n), d(n);
  vector<vector<int>> g(n);
  for (int i = 1; i < n; i++) {
    cin >> c[i] >> d[i];
    c[i]--;
    g[c[i]].push_back(i);
  }
  bool flag = true;
  for (int i = n - 1; i >= 0 && flag; i--) {
    for (auto v : g[i]) {
      long long x = a[v] - b[v];
      if (b[i] / d[v] >= x) {
        b[i] -= d[v] * x;
      } else {
        flag = false;
        break;
      }
    }
    if (b[i] >= a[i]) {
      b[c[i]] += b[i] - a[i];
      b[i] = a[i];
    }
  }
  cout << (flag ? "YES" : "NO") << endl;
  return 0;
}
