#include <iostream>
#include <algorithm>
using namespace std;
int dp[10001][2];
int main(){
    string s;cin>>s;
    reverse(s.begin(),s.end());
    for(int i = 0; s.size() > i; i++){
      dp[i][0] = -1;
      dp[i][1] = -1;
    }
    for(int j = 0; 10 > j; j++){
      if(s[0]-'0' > j){
        if(dp[0][1] == -1)dp[0][1] = (j>4?j-4:j)+(10+j-(s[0]-'0')>4?10+j-(s[0]-'0')-4:10+j-(s[0]-'0'));
        else dp[0][1] = min(dp[0][1],(j>4?j-4:j)+(10+j-(s[0]-'0')>4?10+j-(s[0]-'0')-4:10+j-(s[0]-'0')));
      }else{
        if(dp[0][0] == -1)dp[0][0] = (j>4?j-4:j)+(j-(s[0]-'0')>4?j-(s[0]-'0')-4:j-(s[0]-'0'));
        else dp[0][0] = min(dp[0][0],(j>4?j-4:j)+(j-(s[0]-'0')>4?j-(s[0]-'0')-4:j-(s[0]-'0')));
      }
    }
    for(int i = 1; s.size() > i; i++){
      for(int j = 0; 10 > j; j++){
        //dp[i-1][1]の処理
        if(dp[i-1][1] != -1){
          if(s[i]-'0' >= j){
            if(dp[i][1] == -1)dp[i][1] = dp[i-1][1]+(j>=5?j-4:j)+(10+j-(s[i]-'0'+1)>4?10+j-(s[i]-'0'+1)-4:10+j-(s[i]-'0'+1));
            else dp[i][1] = min(dp[i][1],dp[i-1][1]+(j>=5?j-4:j)+(10+j-(s[i]-'0'+1)>4?10+j-(s[i]-'0'+1)-4:10+j-(s[i]-'0'+1)));
          }else{
            if(dp[i][0] == -1)dp[i][0] = dp[i-1][1]+(j>=5?j-4:j)+(j-(s[i]-'0'+1)>4?j-(s[i]-'0'+1)-4:j-(s[i]-'0'+1));
            else dp[i][0] = min(dp[i][0],dp[i-1][1]+(j>=5?j-4:j)+(j-(s[i]-'0'+1)>4?j-(s[i]-'0'+1)-4:j-(s[i]-'0'+1)));
          }
        }
        //dp[i-1][0]の処理
        if(dp[i-1][0] != -1){
          if(s[i]-'0' > j){
            if(dp[i][1] == -1)dp[i][1] = dp[i-1][0]+(j>=5?j-4:j)+(10+j-(s[i]-'0')>4?10+j-(s[i]-'0')-4:10+j-(s[i]-'0'));
            else dp[i][1] = min(dp[i][1],dp[i-1][0]+(j>=5?j-4:j)+(10+j-(s[i]-'0')>4?10+j-(s[i]-'0')-4:10+j-(s[i]-'0')));
          }else{
            if(dp[i][0] == -1)dp[i][0] = dp[i-1][0]+(j>=5?j-4:j)+(j-(s[i]-'0')>4?j-(s[i]-'0')-4:j-(s[i]-'0'));
            else dp[i][0] = min(dp[i][0],dp[i-1][0]+(j>=5?j-4:j)+(j-(s[i]-'0')>4?j-(s[i]-'0')-4:j-(s[i]-'0')));
          }
        }
        
      }
    }
    cout << min(dp[s.size()-1][0],dp[s.size()-1][1]+1) << endl;
}