#include <stdio.h>
#include <stdlib.h>


int main(void)
{
        int height = 0;
        char buf[150] = { 0 };

        while (height < 1 || height > 23)
        {
                printf("Height: ");
                if (fgets(buf, sizeof(buf), stdin) != NULL)
                        height = atoi(buf);
        }

        for (int i = 0; i < height; i++)
        {
                for (int j = 0; j < height - i - 1; j++)
                        printf(" ");

                for (int j = 0; j < i + 1; j++)
                        printf("#");
                printf("#\n");
        }

return 0;
}