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

import sys

# @profile
def main():
    f = sys.stdin
    # f = open('input.txt', 'r')
    # fo = open('log.txt', 'w')
    n = int(f.readline())
    # b = []
    # for i in range(n):
    #    b.append()
    b = list(map(int, f.readline().strip().split(' ')))
    a = list(map(int, f.readline().strip().split(' ')))
    # return
    b = [b[i] - a[i] for i in range(n)]
    c = [[0, 0]]
    for i in range(n - 1):
        line = f.readline().strip().split(' ')
        c.append([int(line[0]), int(line[1])])
    # print(c)
    for i in range(n - 1, 0, -1):
        # print(i)
        fa = c[i][0] - 1
        if b[i] >= 0:
            b[fa] += b[i]
        else:
            b[fa] += b[i] * c[i][1]
            if b[fa] < -1e17:
                print('NO')
                return 0
    # for x in b:
    #    fo.write(str(x) + '\n')
    if b[0] >= 0:
        print('YES')
    else:
        print('NO')

main()
