#!/usr/bin/ python3.8
import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

N = tuple(map(int, read().decode().rstrip()))

dp = (0, 1)
INF = 10 ** 9
A = [0, 1, 2, 3, 2, 1, 2, 3, 3, 2, 1]
for n in N:
    x = min(dp[0] + A[n], dp[1] + A[10 - n])
    y = min(dp[0] + A[n + 1], dp[1] + A[9 - n])
    dp = (x, y)
print(dp[0])