#include<iostream>
#include <iomanip>
using namespace std;

int main() {
    float x [4][4];

    int i,j,M,N;
    cout<<"Upisite dimenzije niza"<<endl;
    do {
        cout<<"Unesite broj redova: ";
        cin>>N;
        cout<<"Unesite broj kolona: ";
        cin>>M;
    } while ((N>4)||(M>3));

    for (i=0;i<N;i++){
        cout<<"Unesite elemente niza";
        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++){
            for(j=0; j<M; j++)
            {
                cout<<setw(6)<<x[i][j];
            }
        cout<<endl;
    }
    cout<<"Elementi na glavnoj dijagonali su: "<<endl;
    for(i=0; i<N; i++)
    {
    	cout<<setw(3)<<x[i][N-i-1];
    }

    return 0;
}