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;
double ans[100001];
long long x[100001], k[100001];
int main() {
  int n, i;
  cin >> n;
  for (i = 1; i <= n; i++) cin >> ans[i];
  for (i = 1; i <= n; i++) {
    long long a;
    cin >> a;
    ans[i] = a - ans[i];
  }
  for (i = 2; i <= n; i++) cin >> x[i] >> k[i];
  for (i = n; i > 1; i--) {
    if (ans[i] > 0)
      ans[x[i]] += k[i] * ans[i];
    else
      ans[x[i]] += ans[i];
  }
  if (ans[1] < 0.5)
    cout << "YES";
  else
    cout << "NO";
}
