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)

if C3!=0:
    if C2**2-3*C1*C3>=0:
        #print(C2**2-3*C1*C3)
        X1=(-C2+sqrt(C2**2-3*C1*C3))/3/C3
        X2=(-C2-sqrt(C2**2-3*C1*C3))/3/C3
        X=[]
        #print(X1,X2)
        if L<X1<R:
            X.append(X1)
        if L<X2<R:
            X.append(X2)
        #print(X)
        if X:
            flag=True
            for x in X:
                if not(f(L)>0 and f(R)>0 and f(x)>0) or not(f(L)<0 and f(R)<0 and f(x)<0) :
                    flag=False
            if flag:
                ans=min(absf(L),absf(R))
                for x in X:
                    ans=min(ans,absf(x))
                    print(ans)
                    exit()
            else:
                print(0)
                exit()

        else:
            flag=True
            if not(f(L)>0 and f(R)>0) or not(f(L)<0 and f(R))<0:
                flag=False
            if flag: 
                ans=min(absf(L),absf(R))
                print(ans)
                exit()
            else:
                print(0)
                exit()
        
else:
    if C2!=0:
        ans=min(absf(L),absf(R))
        X=-C1/2/C2
        if L<=X<=R:
            ans=min(ans,absf(X))
    else:
        if C1!=0:
            ans=min(absf(L),absf(R))
        else:
            ans=0
print(ans)