import sys
if sys.platform =='ios':
	import clipboard
	a=clipboard.get()
	a = a.split('\n')
	text = '\n'.join(a)
	with open('input_file.txt','w') as f:
		f.write(text)
	sys.stdin = open('input_file.txt')
	

A1, A2, A3 = map(int, input().split())

ans = 0

if A1 == A3:
    
    print(0)
    exit()
    
if (A1 > A2 and A3 > A2) or (A1 < A2 and A3 < A2):
    
    print('INF')
    exit()
    
for i in range(2, 1000 + 1):
    
    B1 = A1 % i
    B2 = A2 % i
    B3 = A3 % i
    
    if B1 != B3 and ((B1 > B2 and B3 > B2) or (B1 < B2 and B3 < B2)):
        
        ans += 1
        
print(ans)