#include <stdio.h>

int main() {
int i,j,n;
scanf("%d",&n);
for(i=1;i<=n;i++){
    for(j=1;j<=i;j++){
        printf("* ");
    }
    printf("\n");
}
for(i=n-1;i<=n;i--){
    for(j=1;j<=i;j++){
        printf("* ")
    }
    printf("\n")
}
return 0;
}