#include<iostream>
#include<time.h>
using namespace std;

void displayNumberWithCommas(int number);

int digitCount(int number)
{
	int result = 1;

	while(number > 9)
	{
		result++;
		number /= 10;
	}

	return result;
}

void main()
{
	 int dollars;

	 cin >> dollars; //12,345
	 //displayNumberWithCommas(dollars);
	 cout << digitCount(dollars) << endl;
}

//assumes the number is a value from 0 - 999
void dispayNumberWithPadding(int number)
{

	//dispays 0 or 00 or 000 or nothing
	//when the number is 0 dispay 000
	//when number 1-9 dispay 00
	//when number 10-99 dispay 0
	//otherwise dispay noting

	if(number == 0)
	{
		cout << "000";
	}
	else if(number > 0 && number < 10)
	{
		cout << "00";
		cout << number;
	}
	else if(number >= 10 && number < 100  )
	{
		cout << "0";
		cout << number;
	}
	else //100 - 999
	{
		cout << number;
	}
}


void displayNumberWithCommas(int number)
{
	int billions = number/1000000000;
	number = number - billions * 1000000000;
	int millions = number/1000000;
	number = number - millions * 1000000;
	int thousands = number/1000;
	number = number - thousands * 1000;
	int hundreds = number;

	bool mustPad = false;

	//12345  0,0,12,345
	if(billions > 0)
	{
		cout << billions << ",";
		mustPad = true;
	}

	if(mustPad)
	{
		dispayNumberWithPadding(millions);
		cout << ",";
	}
	else if(millions > 0)
	{
		cout << millions << ",";
		mustPad = true;
	}

	if(mustPad)
	{
		dispayNumberWithPadding(thousands);
		cout << ",";
	}
	else if(thousands > 0)
	{
		cout << thousands << ",";
		mustPad = true;
	}

	if(mustPad)
	{
		dispayNumberWithPadding(hundreds);
	}
	else 
	{
		cout << hundreds << endl;
	}

}