A=list(map(int,input().split()))
cnt=0
if A[0]==A[2]:
    print(0)
elif A[1]==max(A) or A[1]==min(A):
    print("INF")
else:
    for i in range(1,max(A)+1):
        B1,B2,B3=A[0]%i,A[1]%i,A[2]%i
        if (B1<B2 and B2>B3) or (B1>B2 and B2<B3):
            if B1!=B3:
                cnt+=1
    print(cnt)