#include <iostream>

using namespace std;
int ccount(int &a) {
    int count = 0;
    if (a == 0) {
        cout << 1;
    }
    while (a != 0) {
        a /= 10;
        count++;
    }
    return count;
}
int main()
{
    int a;
    cin >> a;
    cout << ccount(a);
}