# alpha := 解の小さい方、beta := 解の大きい方

import math

A, B, C = map(int, input().split())
alpha, beta = sorted([(-B - math.sqrt(B**2 - 4 * A * C)) / (2 * A), (-B + math.sqrt(B**2 - 4 * A * C)) / (2 * A)])

ans = 0
for n in range(-(10**6), 10**6 + 1):
    if alpha < n < beta:
        ans += 1

print(ans)