#include <iostream>
using namespace std;
int main() {
int n, nfinal, c1, c2, c3, c4;
cout << "Introduceti n:";
cin >> n;
c4 = n % 10;
n = n / 10;
c3 = n % 10;
n = n / 10;
c2 = n % 10;
c1 = n / 10;
nfinal = c1 * 1000 + c3 * 100 + c2 * 10 + c4;
cout <<endl<< nfinal;
return 0;
}
//Testat in Visual Studio, functioneaza perfect.