#include <iostream>
using namespace std;
int main(){
    int  n ;
    
    if(!(cin>>n)){
        cout<<"Invalid input";
    }
    if (n==0){
        cout<<1<<endl;
        return o ;
    }
    n = abs(n);
    int c = 0;
    while (n>0){
        c++;
        n/=10;
    }
    cout<<c;
}