#include <stdio.h>

void stars_row (int x, int n)
{
    int c = n / 2, l = c - x / 2, r = c + x / 2;
    for (int i = 0; i < n; i++)
    {
        if (l <= i && i <= r) printf ("*");
        else printf (" ");
    }
    printf ("\n");
}

void print_tree (int s[], int sz) {
    int mx = 0;

    for (int i = 0; i < sz; i++) {
        if (mx < s[i]) {
            mx = s[i];
        }
    }

    for (int i = 0; i < sz; i++) {
        stars_row (2 * s[i] + 1, 2 * mx + 1);
    }

}

int main ()
{
    int a[] = {1, 2, 3, 2, 1, 4, 5, 2};

    print_tree (a, 8);
}