import decimal

decimal.getcontext().prec = 1000
A, B, C = map(decimal.Decimal, input().split())
if A < 0:
    A = -A
    B = -B
    C = -C
D = (B * B - 4 * A * C).sqrt()
L = (-B - D) / (2 * A)
R = (-B + D) / (2 * A)

l = L.__ceil__()
while not L<l: l+=1
while L<l-1:l-=1
r=R.__ceil__()
while not r<R: r-=1
while r+1<R:r+=1

print(r-l+1)