#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;
		if (ost == 3)
			return true;
	} while (n != 0);
	return false;
}
int Zamjena(int n) {
	int s = 0;
	int ost = 0;
	int suma = 0;
	int temp;
	int br = BrojCifara(n);
	do {
		ost = n % 10;
		n /= 10;
		if (ost == 3) {
			cout << "Unesite zamjenu za tricu: " << endl;
			cin >> temp;
			ost = temp;
		}
		suma += pow(ost, br);
		br--;
	} while (n != 0);
	return suma;
}

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