A, B, C = map(int, input().split())
M = 5000
M2 = M * M
dp = [0] * M2
a = 0
while a < M2:
    b = 0
    if dp[a]:
        break
    while a + b < M2:
        c = 0
        if dp[a + b]:
            break
        while a + b + c < M2:
            if dp[a + b + c]:
                break
            else:
                dp[a + b + c] = 1
                c += C
        b += B
    a += A
    
if 0 in dp[M2//2:]:
    print("INF")
else:
    print(dp.count(0))