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

#define MAXLEN 20
void usage(char *str)
	{
	fprintf(stderr, "%s\n", str);
	exit(-1);
	}
main(int argc, char *argv[])
	{
	int	i;
	int	x, y;
	int	level, max_level, min_level;
	int	level_tab[MAXLEN];
	int	code_len;

	if (argc != 2)
		usage("nombre d'arguments invalide");
	if (argv[1][0] != '*')
		usage("mauvais code initial");
	if ((code_len = strlen(argv[1])) > MAXLEN)
		usage("code trop long");
	/*
	** minimax
	*/
	max_level = min_level = level = 0;
	level_tab[0] = 0;
	for (i = 1; argv[1][i]; i++)
		{
		switch (argv[1][i])
			{
			case 'u': case 'U':
				level += 1;
				if (level > max_level)
					max_level = level;
				break;

			case 'd': case 'D':
				level -= 1;
				if (level < min_level)
					min_level = level;
				break;

			case 'r': case 'R':
				break;

			default:
				usage("mauvais code");
				break;
			}
		level_tab[i] = level;
		}
	printf("\n");
	for (y = max_level; y >= min_level; y--)
		{
		if (y == 0)
			printf("  *");
		else	printf("   ");
		for (x = 1; x < code_len; x++)
			{
			if (level_tab[x] == y)
				{
				if (level_tab[x-1] == level_tab[x])
					printf("-*");
				else	printf(" *");
				}
			else	printf("  ");
			}
		printf("\n  ");
		for (x = 1; x < code_len; x++)
			{
			if (level_tab[x] == y)
				{
				if (level_tab[x-1] < y)
					printf(" /");
				else	printf("  ");
				}
			else if (level_tab[x-1] == y && level_tab[x] < y)
				{
				printf(" \\");
				}
			else	printf("  ");
			}
		printf("\n");
		}
	printf("\n");
	}