v72s2e5

#include<iostream>
using namespace std;
int a[25][25];
int main()
 {
  int i,j,c,l,n,k=1;
  cin>>n;
  for(i=1;i<=n;i++)
    {
     l=i;
     c=1;
       while(l>=1 && c<=n)
        {
         a[l][c]=k;
         a[n+1-c][n+1-l]=k;
         k++;
         l--;
         c++;
         }
       }
      for(i=1;i<=n;i++)
       {
        for(j=1;j<=n;j++)
         cout<<a[i][j]<<" ";
         cout<<endl;
        }
       }