#include <iostream>
#include <string>
 
using namespace std;
 
template <typename T>
string f(const T& var)
{
    return "sam durak";
}
 
template <typename T>
T square(T v) { return v*v; }
 
int f(int v)
{
    cout << "int" << endl;
    return square(v);
}
 
double f(double v)
{
    cout << "double" << endl;
    return square(v);
}
 
class Shit
{
 
};
 
int main()
{
 
    cout << f(4) << endl;
    cout << f(5.7) << endl;
 
    Shit s;
    cout << f(s) << endl;
 
    return 0;
}
 

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