A, B, C = map(int,input().split())
ANS = 0
if (A != C and A > B and C > B) or (A != C and A < B and C < B):
    print("INF")
else:
    ANS = 0
    for R in range(1, 1011):
        A2, B2, C2 = A % R, B % R, C % R
        if (A2 != C2 and A2 > B2 and C2 > B2) or (A2 != C2 and A2 < B2 and C2 < B2):
            ANS += 1
    print(ANS)