#include <iostream>
#include <vector>
using namespace std;

int contarCifras(int n) {

  if (n / 10 == 0)
    return 1;

  return contarCifras(n / 10) + 1;

}


int main () {

  vector<int> pruebas = {0, 7, 10, 25, 328, 400, 1000, 9999};

  for (int i = 0; i < pruebas.size(); i++)
    cout << "contarCifras(" << pruebas[i] << ") = " << contarCifras(pruebas[i]) << endl;

}