import sys

# sys.setrecursionlimit(200005)
# sys.set_int_max_str_digits(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()

dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
# inf = -1-(-1 << 31)
inf = -1-(-1 << 62)

md = 10**9+7
# md = 998244353

def f(x):
    return cc[3]*x**3+cc[2]*x**2+cc[1]*x+cc[0]

cc=LI()
l,r=LI()

a=3*cc[3]
b=2*cc[2]
c=cc[1]

yy=[f(l),f(r)]
if a and b**2-4*a*c>=0:
    x=(-b+(b**2-4*a*c)**0.5)/2/a
    if l<=x<=r:yy.append(f(x))
    x=(-b-(b**2-4*a*c)**0.5)/2/a
    if l<=x<=r:yy.append(f(x))
if a==0 and b:
    x=-c/b
    if l<=x<=r:yy.append(f(x))

yy.sort()
if yy[0]<=0 and yy[-1]>=0:
    print(0)
else:
    print(min(abs(y) for y in yy))