#Kadomore
#import math
def ka(b,c,d):
    if b<c and c>d:
        return 1
    elif b>c and c<d:
        return 1
    else:
        return 0
a=[int(i) for i in input().split()]
if ka(a[0],a[1],a[2])==1:
    print(INF)
else:
    b=[0]*3
    p=1
    c=0
    M=a[0]
    i=1
    while i<3:
        if M<a[i]:
            M=a[i]
        i+=1
    while p<=M+1:
#math.sqrt()
        for i in range(3):
            b[i]=a[i]%p
        if ka(b[0],b[1],b[2])==1:
            c+=1
    print(c)