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