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

rd = lambda: list(map(int, input().split()))

n = rd()[0]
b = [0] + rd()
a = [0] + rd()
x = [0 for _ in range(n + 1)]
k = [0 for _ in range(n + 1)]

for i in range(2, n + 1):
    x[i], k[i] = rd()

for i in range(n, 0, -1):
    if b[i] < a[i]:
        if i == 1 or k[i] * (a[i] - b[i]) > b[x[i]]:
            print("NO")
            exit(0)
        
        b[x[i]] -= k[i] * (a[i] - b[i])
        b[i] = a[i]
    
    b[x[i]] = b[x[i]] + b[i] - a[i]

print("YES")