#include<bits/stdc++.h>
using namespace std;
using Int = long long;

template<typename T> void chmin(T &a,T b){if(a>b) a=b;}
template<typename T> void chmax(T &a,T b){if(a<b) a=b;}

const Int INF = 1e9;
Int dp[2][11234];
signed main(){
  string s;
  cin>>s;
  while(s.back()=='0') s.pop_back();
  for(Int i=0;i<2;i++)
    for(Int j=0;j<11234;j++)
      dp[i][j]=INF;


  auto calc=[](Int x){return x/10+((x%10)/5)+(x%5);};
  Int n=s.size();
  dp[0][0]=0;
  dp[1][0]=1;
  for(Int i=0;i<n;i++){
    chmin(dp[0][i+1],dp[0][i]+calc(s[i]-'0'));
    
    for(Int k=s[i]-'0'+1;k<10;k++)
      chmin(dp[1][i+1],dp[0][i]+calc(k)+calc(k-(s[i]-'0'+1)));

    for(Int k=0;k<10;k++)
      chmin(dp[1][i+1],dp[1][i]+calc(k)+calc(k+(9-(s[i]-'0')+(i==n-1))));
  }
  
  cout<<min(dp[0][n],dp[1][n])<<endl;
  return 0;
}