#include <iostream>
#include <iomanip>
using namespace std;
int main ()
{
	float x[4][4];
	int i,j,N,M;

	cout<<"Upisite dimenzije niza"<<endl;

	do
	{
		cout<<"broj redova=";
		cin>>N;
		cout<<"Broj kolona=";
		cin>>M;
	}

	while ((N>4)||(M>3));
	for(i=0;i<N;i++)
	{
		cout<<"Unesite elemente niza"<<endl;
		for(j=0;j<M;j++)
		{
	    cout<<"x["<<i<<","<<j<<"]=";
	    cin>>x[i][j];
	}
}
    cout<<"Niz je ucitan"<<endl;

    cout<<"Upisali ste niz"<<endl;
    for(i=0;i<N;i++)
    {
	for (j=0;j<M;j++)
	{
		cout<<setw(6)<<x[i][j];
	}

	cout<<endl;
    }
    cout<<"Elemenit na glavnoj dijagonali su : ";
    for (i=0;i<N;i++)
    {
    	cout<<setw(3)<<x[i][N-i-1];
    }
return 0;
}