#include<iostream>
using namespace std;
int main()
    {
      int n;
      int count=0;
      cin>>n;
      if (n==0)
      {
          cout<<1;
      }
      if(n<0)-=n;
      while (n>0)
      {
          n=n/10;
          count++;
      }
      cout<<count;
      return 0;
    }