#include<stdio.h>
int main()
{
    int n;
    scanf("%d", &n);
    if (n % 2 == 0 || n <= 0)
    {
        printf("Invalid input");
        return 0;
    }
    for (int i = n; i >= 1; i -= 2)
    {for (int j = 0; j < i; j++)
    {
        printf("\n");
    }
    return 0;
}