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

int randomRange(int low, int high)
{
    return rand() % (high - low + 1) + low;
}

int draw(){
    int a;
    int k = 2;
    cout<<"Input size: ";
    cin>>a;

    if ((a <2) || (a>30))
    {
        cout<<"Error";
        return 0;
    }
    char arr[30][30] = {{0}};
    char random;
    char max='0', min='9';
    for(int i=0; i<a; i++){
        random = randomRange('0', '9');
        arr[0][i] = random;
        random = randomRange('0', '9');
        arr[a-1][i] = random;
        random = randomRange('0', '9');
        arr[i][a-1] = random;

        for (int i =k; i<a; i++){
            random = randomRange('0', '9');
            arr[i][0] = random;
        }

        for(int i=k; i<a-k; i++){
            random = randomRange('0', '9');
            arr[k][i-1] = random;
            random = randomRange('0', '9');
            arr[a-k-1][i] = random;
            random = randomRange('0', '9');
            arr[i][a-k-1] = random;

            for (int i =k+2; i<a-k; i++){
                random = randomRange('0', '9');
                arr[i][k] = random;
            }
        }
        k+=2;
    }

    for(int i=0;i<30;i++){
       for(int j=0;j<30;j++){
            cout << arr[i][j];
       }
       cout << endl;
    }
    if (k<a-2)
        draw();
    for (int i = 1; i < a; i++) {
          for (int j = 1; j < a; j++) {
              if (arr[i][j] > max) {
                  max = arr[i][j];
              }
          }
      }
      for (int i = 1; i < a; i++) {
          for (int j = 1; j < a; j++) {
              if ((arr[i][j] < min) && (arr[i][j]!=0)) {
                  min = arr[i][j];
              }
          }
      }
      cout << "MAX = ";
      cout << max;
      cout << endl;
      cout << "MIN = ";
      cout << min;
    return 0;

}

int main(){
        draw();
        getchar();
        return 0;
    }