s, t, n = map(int, input().split())  # start time, class time, transit routes
d = list(map(int, input().split()))  # d(0)...d(n+1)  # walking times
b = list(map(int, input().split()))  # b(0)...b(n)  # ride times
c = list(map(int, input().split()))  # c(0)...c(n)  # bus arrival intervals

s += d[0]

for i in range(n):
    passed_arrival_time = s % c[i]
    if passed_arrival_time > 0:
        s += c[i] - passed_arrival_time
    s += b[i]
    s += d[i + 1]

print("yes" if s <= t else "no")