#include <iostream>
 
template <class Data>
struct Processor {
 
    int process(const Data &data)
    {
        return 2;
    }
 
    int process(Data &data)
    {
        return 1;
    }
 
};
 
int main() {
 
    using data_type = int;
 
    data_type non_const_data = 1;
    const data_type const_data = 2;
 
    std::cout << Processor<data_type>().process(non_const_data) << std::endl;
    std::cout << Processor<data_type>().process(const_data) << std::endl;
 
    return 0;
}

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