#include <iostream>
using namespace std;

int main()
{
	int numb;
	cout << "Unesi trocifreni broj: ";
	do {
	cin >> numb;
	cout << "yup";}
	while (numb >= 100 and numb < 1000);

	while(numb > 0)
	{
		int mod;
		mod = numb % 10;
		numb /= 10;

		if (mod == 0)
			continue;
		else
			cout << mod;


	}
	return 0;
}