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P51222_en/S001-AC.cc 233 Bytes
Imanol-Mikel Barba Sabariego authored
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#include <iostream>

using namespace std;

int number_of_digits(int n)
{
	if(!n || !(n/10))
	{
		return 1;
	}
	return 1 + number_of_digits(n/10);
}
int main()
{

	int a;
	cin >> a;
	cout << number_of_digits(a) << endl;
	return 0;

}