#include <iostream>
using namespace std;
string number;
int counter = 0;
int main()
{
cout << "Wprowadz numer:" << endl;
cin >> number;
cout << "wpisales: " << number << endl;
for(int i=0; i<number.length() ; i++) {
if(number[i] == '1'){
counter++;
}
}
cout << "Ilosc jedynek: " << counter << endl;
return 0;
}