#include<iostream>
#include<string>
#include<cctype>
#include<cmath>
using namespace std;
int main()
    {
        string i;
        cin>>i;
        {
            if(!isdigit(c)&&c!='-'&&c!='+')
            {
                cout<<"Invalid input"
                return 0;
            }
        }
        int n=stoi(i);
        n=abs(n);
        if(n==0)
        {
            cout<<1;
            return 0;
        }
        int c=0;
        while(n>0)
        {
            n/=10;
            c++;
        }
        cout<<c<<endl;
        return 0;
    }