#include <complex>
#include <iostream>

template<typename T, typename U>
std::complex<T> makeComplex(T a, U b){
    return std::complex<T>(a,b);
}

int main(){
    std::complex<int> a = makeComplex(4,5);
    std::complex<double> b = makeComplex(3.0,5.2);
    std::complex<int> c = makeComplex(1,5.2);

    std::cout << a << std::endl << b << std::endl << c << std::endl;
}