문제 - https://codeforces.com/problemset/problem/1633/C


def f(a,b):

if a%b==0:

    return a//b

else:

    return a//b+1

t=int(input())

for _ in range(t):

c=0

hc,dc=map(int,input().split())

hm,dm=map(int,input().split())

k,w,a=map(int,input().split())

for i in range(k+1):

if f(hm,dc+i*w)<=f(hc+(k-i)*a,dm):

c=1

break

if c==0:

print('NO')

else:

print('YES')



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