#include <iostream>
using namespace std;

int main()
{
    int n;
    cin >> n;
    int cifri = 0;
    if(n == 0) {
        cifri = 1;
    }
    while(n > 0) {
        n /= 10;
        cifri += 1;
    }
    cout << cifri << endl;
    return 0;
}