#include <iostream>
using namespace std;
int BrojCifara(int n) {
	int brojac = 0;
	do {
		n /= 10;
		brojac++;
	} while (n != 0);
	return brojac;
}
bool Provjera(int n) {
	int ost = 0;
	do {
		ost = n % 10;
		n /= 10;
	} while (n != 0);
	if (ost == 3)
		return true;
	return false;
}
int Zamjena(int n) {
	int s = 0;
	int ost = 0;
	int br = BrojCifara(n);
	do {
		ost = n % 10;
		n /= 10;
	} while (n != 0);
	if (ost == 3) {
		s += temp*pow(ost, br);
	}
	return s;
}

void main() {
	int n;
	int temp;
	cout << "Unesi:" << endl;
	cin >> n;
	if (Provjera(n) == true) {
		cout << "Jeste i unesite zamjenu: " << endl;
		cin >> temp;
		cout << "Nakon zamjene: " << Zamjena(n) << endl;
	}
	else
		cout << "Nema trice." << endl;
}