"use strict";
var input=require("fs").readFileSync("/dev/stdin","utf8");
var cin=input.split(/ |\n/),cid=0;
function next(a){return a?cin[cid++]:+cin[cid++];}
function nexts(n,a){return a?cin.slice(cid,cid+=n):cin.slice(cid,cid+=n).map(a=>+a);}
function nextm(h,w,a){var r=[],i=0;if(a)for(;i<h;i++)r.push(cin.slice(cid,cid+=w));else for(;i<h;i++)r.push(cin.slice(cid,cid+=w).map(a=>+a));return r;}
function xArray(v){var a=arguments,l=a.length,r="Array(a["+--l+"]).fill().map(x=>{return "+v+";})";while(--l)r="Array(a["+l+"]).fill().map(x=>"+r+")";return eval(r);}

var myOut = main();
if(myOut !== undefined)console.log(myOut);
function main(){
  var n = next(1);
  var nl = n.length;
  while(n[nl-1] === "0")nl--;
  var ans1 = 2, ans2 = 0;
  for(var i = nl; i--;){
    var x = +n[i];
    var t = Math.min(ans2 + 2, ans1);
    ans2 = Math.min(ans1,ans2)+x;
    ans1 = t - x + 9;
  }
  return Math.min(ans1,ans2);
}