8/1

#include<iostream>
#include<time.h>
using namespace std;

int main()
{
   unsigned short n;
    int sum=0 ;
    srand(time(0));


       cout << "n = ";
       cin >> n;

      float **matris = new float*[n];
      for(int y=0; y < n ; y++)
      matris[y]=new float [n];

   for(int i=0 ; i < n ; i++){
    for(int j=0; j < n ; j++){

      matris[i][j] = rand()%30+1;
    }


    }

    for(int i=0 ; i < n ; i++){
    for(int j=0; j < n ; j++){

      cout << matris[i][j] << " ";
    }

        cout << endl ;
    }

    cout << endl;

    for(int i=(n/2) ; i >=0  ; i--){
    for(int j=i+(n/2); j >= (n/2) ; j--){
      cout << matris[i][j] << " ";

    }

        cout << endl ;
    }
    for(int i=n/2 ; i >= 0 ; i--){
    for(int j=i+(n/2); j >= n/2 ; j--){
      if(matris[i][j] > 9 && matris[i][j] < 100 ){
          sum+=matris[i][j];
      }

    }


    }
  cout <<endl << sum ;
}