2020/day05.c


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#include <stdio.h>
#include <stdlib.h>
static int id(const char *s) {
	int row = 0, col = 0, size = 128;
	while (*s == 'F' || *s == 'B') {
		size /= 2;
		if (*s++ == 'B') row += size;
	}
	size = 8;
	while (*s) {
		size /= 2;
		if (*s++ == 'R') col += size;
	}
	return row * 8 + col;
}
int main(void) {
	char s[11];
	int max = 0;
	while (EOF != scanf("%s\n", s)) {
		if (id(s) > max) max = id(s);
	}
	printf("%d\n", max);
}