// editor5
#include <iostream>
#include <string>
using namespace std;
int main(){
    string input;
    cin>>input;
    int start = 0;
    if(input[0] == '-'){
        start = 1;
    }
    for(int i = start; i<input.length();i++){
        cout++;
    }
    cout<<count;
        return 0;
}