Overload Resolution Trap

#include <iostream>
using namespace std;

void foo(int x) {
    cout << "int overload\n";
}

void foo(int* p) {
    cout << "int* overload\n";
}

int main() {

   // your code here
   foo(nullptr);
   
   cout << 3.3 + NULL;  // NULL: macro defined as 0 
   
   return 0;
}