import sys
input=lambda: sys.stdin.readline().rstrip()
A=[int(i) for i in input().split()]
def chk(A):
  if A[1]<A[0] and A[1]<A[2]:
    return True
  elif A[1]>A[0] and A[1]>A[2]:
    return True
  else:
    return False

def primes(n):
  is_prime=[True]*(n+1)
  is_prime[0]=False
  is_prime[1]=False
  for i in range(2,int(n**0.5)+1):
    if not is_prime[i]:
      continue
    for j in range(i*2,n+1,i):
      is_prime[j]=False
  return [i for i in range(n+1) if is_prime[i]]

if chk(A):
  print("INF")
else:
  ans=0
  P=primes(max(A))
  for p in P:
    B=[]
    for a in A:
      B.append(a%p)
    if chk(B):
      ans+=1
  print(ans)