UVA - 227 Puzzle

#include<stdio.h>

int main()
{
	int x, y, kase = 0, first = 1;
	char s[10][10], c;
	while (1) {
		c = getchar();
		if (c == 'Z')
			break;
		int j = 0;
		do {
			if (c == ' ') {
				x = 0;
				y = j;
			}
			s[0][j] = c;
			j++;
			c = getchar();
		} while (c != '\n');
		if (j == 4) {
			s[0][j] = ' ';
			x = 0;
			y = j;
			j++;
		}
		s[0][j] = '\0';
		for (int i = 1; i < 5; ++i) {
			j = 0;
			while ((c = getchar()) != '\n') {
				if (c == ' ') {
					x = i;
					y = j;
				}
				s[i][j] = c;
				j++;
			}
			if (j == 4) {
				s[i][j] = ' ';
				x = i;
				y = j;
				j++;
			}
			s[i][j] = '\0';
		}
		int flag = 1;
//		printf("x = %d, y = %d\n", x, y);
		while ((c = getchar()) != '0') {
			if (!flag || c == '\n')
				continue;
			if (c == 'A') {
				if (x - 1 >= 0) {
					s[x][y] = s[x - 1][y];
					s[x - 1][y] = ' ';
					x = x - 1;
				} else {
					flag = 0;
				}
			} else if (c == 'B') {
				if (x + 1 < 5) {
					s[x][y] = s[x + 1][y];
					s[x + 1][y] = ' ';
					x = x + 1;
				} else {
					flag = 0;
				}
			} else if (c == 'L') {
				if (y - 1 >= 0) {
					s[x][y] = s[x][y - 1];
					s[x][y - 1] = ' ';
					y = y - 1;
				} else {
					flag = 0;
				}
			} else if (c == 'R') {
				if (y + 1 < 5) {
					s[x][y] = s[x][y + 1];
					s[x][y + 1] = ' ';
					y = y + 1;
				} else {
					flag = 0;
				}
			}
		}
		getchar();
		if (first)
			first = 0;
		else
			printf("\n");
		printf("Puzzle #%d:\n", ++kase);
		if (flag) {
			for (int i = 0; i < 5; ++i) {
				for (j = 0; j < 4; ++j) {
					printf("%c ", s[i][j]);
				}
				printf("%c\n", s[i][4]);
			}
		} else {
			printf("This puzzle has no final configuration.\n");
		}
	}
	return 0;
}