#include <iostream>
#include <string>
using namespace std;
int main() {
    string dane;
    cout << "Podaj w formacie cena=123: ";
    cin>>dane;

    size_t pos = dane.find('=');
    if (pos != string::npos) {
        string liczbaStr = dane.substr(pos + 1);
        int cena = stoi(liczbaStr);
        cout <<"Cena + 10 =" << cena + 10 << endl;
    }else {
        cout << "Brak znaku ="<< endl;
    }
    return 0;
}