a, b, c = map(int, input().split())

def judge(a, b, c):
  if b > a and b > c and not a == c or b < a and b < c and not a == c:
    return True
  else:
    return False

def f():
  count = 0
  if a == c:
    return '0'
  if judge(a, b, c):
    return 'INF'

  for i in range(1, 1001):
    if judge(a%i, b%i, c%i):
      count += 1
  return count
print(f())