from math import sqrt
C0,C1,C2,C3=map(int,input().split())
L,R=map(int,input().split())

def f(x):
    return C0+C1*x+C2*x**2+C3*x**3
def absf(x):
    return abs(C0+C1*x+C2*x**2+C3*x**3)

N=1000000
ans=10**10
for i in range(L*N,R*N+1):
    ans=min(ans,absf(i/N))
print(ans)