# yukicoder No.358 も～っと！門松列 2020/01/31

a=list(map(int,input().split()))

if a[0]==a[1] or a[1]==a[2] or a[0]==a[2]:
    print(0)
    exit()

if a[0]<a[1] and a[2]<a[1] or a[0]>a[1] and a[2]>a[1]:
    if a[0]!=a[2]:
        print('INF')
        exit()

mx=max(a)+1
cnt=0
for i in range(1,mx):
    a1=a[0]%i
    a2=a[1]%i
    a3=a[2]%i
    if a1<a2 and a3<a2 or a1>a2 and a3>a2:
        if a1==a3:continue
        cnt+=1
print(mx)