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