using namespace std;

int main() {
    int n;
    cin >> n;
    int a[101][101] = {0};
    int num = 1;
    
    for (int j = 1; j <= n; j++)
    {
        int h = 1;
        int l = j;
        while (h <= n && l >= 1)
        {
            if(j%2==0)a[h][l]=num++;
            else a[l][h]=num++;
            h++;
            l--;
        }  
    }
    
    for(int i = 2; i <= n; i++)
    {
        int h = i;
        int l = n;
        while (h <= n && l >= 1)
        {
            if((n+i)%2!=0)a[h][l]=num++;
            else a[l][h]=num++;
            h++;
            l--;
        }	
    }
    
    for(int i = 1; i <= n; i++) {
        for(int j = 1; j <= n; j++) {
            cout << a[i][j];
            if(j < n) cout << " ";
        }
        cout << endl;
    }
    
    return 0;
}