mat_sq(pb23)

#include <bits/stdc++.h>
using namespace std;

int main() {

int n,i,j,a[100][100],k;

cin>>n;
for (i=0;i<n;i++)
{
    k=i+1;
    for (j=n-1;j>=0;j--)
    {
        a[i][j]=k;
        if (k>1)
            k--;
    }
}

for (i=0;i<n;i++) {
    for (j=0;j<n;j++)
  cout<<a[i][j]<<' ';
  cout<<endl;
}
  return EXIT_SUCCESS;
}