a1,a2,a3 = map(int,input().split())
if (a1!=a3 and ((a2<a1 and a2<a3) or (a2>a1 and a2>a3))):
    print('INF')
else:
    cnt=0
    for i in range(3,1001):
        b1,b2,b3 = a1%i,a2%i,a3%i
        cnt += (b1!=b3 and ((b2<b1 and b2<b3) or (b2>b1 and b2>b3)))
    print(cnt)