#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
#include <vector>
#include <cmath>


template <class T>
class Matrix {
private:
    std::vector<std::vector<T>> Matr;
public:
    Matrix(const std::vector<std::vector<T>>& matrix) {
        Matr = matrix;
    }

    std::pair<size_t , size_t> size() const {
        if (Matr.empty()) {
            return {0, 0};
        } else {
            return {Matr.size(), Matr.front().size()};
        }
    }
};

std::ostream& operator << (std::ostream& out, const Matrix& mat) {
    std::string outLine;
    std::stringstream os(outLine);
    for (auto& line : mat.Matr) {
        for (auto& elem : line) {
            os << elem << "\t";
        }
        outLine.pop_back();
        os << "\n";
    }
    outLine.pop_back();
    out << outLine;
}