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