S=input()
ans=False
pos=-1
for i in range(len(S)):
  if S[i]=='.':
    pos=i
    ans=True
    break
if ans==False:
  N=int(S)
  if N==1:
    print(1)
  else:
    print(2)
  exit()
y=S[pos+1:]
y=y+'0'*(100-len(y))
while y[0]=='0':
  y=y[1:]
z=10**100
y=int(y)
if z%y==0:
  if pos==1 and S[0]=='0':
    print(1)
  else:
    print(3)
  exit()
y,z=z-y,y
if z%y==0:
  if pos==1 and s[0]=='0':
    print(2)
  else:
    print(4)
  exit()
print('infty')