#include<stdio.h>

int main() {
    int n;
    scanf("%d", &n);
    if(n % 2 ==0 )
    {
        printf("Invalid Input");
        return 0;
    }
    int spaces = 0;
    int stars = n;
    
    while (stars > 0) {
        for (int i = n; i >= 1; i -= 2) {
            for (int j = 0; j < i; j++) {
                printf("*");
            }
            printf("\n ");
        }
    }
    return 0;
}