///Sa sortam descrescator diagonala principala si sa se afiseze matricea in noua sa forma
#include <iostream>
using namespace std;
int main()
{
    int a[100][100],n,i,j,aux;
    cout<<"n=";
    cin>>n;
    for(i=1;i<=n;i++)
        for(j=1;j<=n;j++)
        {
            cout<<"a["<<i<<"]["<<j<<"]=";
            cin>>a[i][j];
        }
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
            cout<<a[i][j]<<' ';
        cout<<endl;
    }
    cout<<endl<<endl;
    for(i=1;i<=n-1;i++)
    {
        for(j=i+1;j<=n;j++)
            if(a[j][j]>a[i][i])
            {
                aux=a[i][i];
                a[i][i]=a[j][j];
                a[j][j]=aux;
            }
    }
    for(i=1;i<=n;i++)
    {
        for(j=1;j<=n;j++)
            cout<<a[i][j]<<' ';
        cout<<endl;
    }
    return 0;
}