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;
const int N = 1e5 + 5;
long long b[N];
long long a[N];
int x[N];
long long k[N];
int main() {
  int n;
  cin >> n;
  for (int i = 1; i <= n; i++) {
    scanf("%lld", b + i);
  }
  for (int i = 1; i <= n; i++) {
    scanf("%lld", a + i);
  }
  for (int i = 2; i <= n; i++) {
    scanf("%d %lld", x + i, k + i);
  }
  for (int i = n; i >= 2; i--) {
    if (b[i] > a[i]) {
      b[x[i]] += b[i] - a[i];
    } else if (b[i] < a[i]) {
      if ((a[i] - b[i]) > 1000000000000000000 / k[i]) {
        cout << "NO" << endl;
        return 0;
      }
      a[x[i]] += (a[i] - b[i]) * k[i];
      if (a[x[i]] >= 5e17) {
        cout << "NO" << endl;
        return 0;
      }
    }
  }
  if (b[1] >= a[1]) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
    return 0;
  }
}
