#include <iostream>

void f(int n) {
   std::cout << "en f(int)\n";
}

void f(int a, int b) {
   std::cout << "en f(int, int)\n";
}

void f(double d) {
   std::cout << "en f(double)\n";
}

int main( ) {
   f(5);
   f(3.14);
   f(1, 2);
}