read a
x=10#${a/.}
y=1000
f=x%m+y%m==0?x/=m,y/=m,f:x+y
printf \\10$[m=2,f,m=5,f&1?x&1?3:2:1]\ $[f*3/2+(x<y?y-x:x-y)/2-2]