import math
a,b,c = map(int,input().split())
if math.gcd(a,math.gcd(b,c)) != 1:
    print("INF")
    exit()
l = sorted([a,b,c])
M = l[1]*l[2]+1
dp = [0]*M
for i in range(3):
    for j in range(2000):
        if a*j >= M:
            break
        for k in range(2000):
            if a*j + b*k >= M:
                break
            dp[a*j+b*k] = 1
    a,b,c = b,c,a
ans = 0
for i in range(1,M):
    ans += 1-dp[i]
print(ans)