class Matrix

#include <bits/stdc++.h>
using namespace std;
class Matrix{
    public:
        Matrix();
        Matrix(int,int,int);
        ~Matrix();
        friend istream& operator>>(istream &in, Matrix& M);
        friend ostream& operator<<(ostream &out, Matrix &M);
    private:
        int n;
        int m;
        int **Data;
};
Matrix::Matrix()
{
    this->n=0;
    this->m=0;
}
Matrix::Matrix(int n,int m, int val)
{
    this->n=n;
    this->m=m;
    this->Data=new int* [n];
    for(int i=0;i<n; i++)
        this->Data[i]=new int [n];
    for(int i=0;i<n;i++)
    for(int j=0;j<m;j++)
    this->Data[i][j]=val;
}
Matrix::~Matrix()
{
    for(int i=0;i<n;i++)
    delete[] this->Data[i];
    delete this->Data;
}
istream& operator >> (istream &in, Matrix& M)
{
    int i,j;
    in>>M.n;
    in>>M.m;
    M.Data=new int* [M.n];
    for(i=0; i<=M.n-1;i++) M.Data[i]=new int [M.m];
    // Cấp phát
    for(i=0;i<=M.n-1;i++)
    for(j=0;j<=M.m-1;j++)
        in>>M.Data[i][j];
    return in;
}
ostream& operator<<(ostream &out, Matrix &M)
{
    for(int i=0;i<=M.n-1;i++)
    {for(int j=0;j<=M.m-1;j++)
        out<<M.Data[i][j]<<" ";
        out<<endl;}
}
int main(){
    Matrix M();
    cin>>M;
    cout<<M;
    return 0;
}