N=input().strip()
LEN=len(N)

Y=[0,1,2,3,2,1,2,3,3,2,1]

from functools import lru_cache
@lru_cache(maxsize=None)
def calc(i,k):
    if i==-1:
        return k
    if k==0:
        x=int(N[i])
    else:
        x=int(N[i])+1

    ANS=min(Y[x]+calc(i-1,0),Y[10-x]+calc(i-1,1))

    return ANS
        


print(calc(LEN-1,0))