#include <stdint.h>
#include <stdio.h>

int main() {
	// your code goes here
	uint32_t begin = 0xffffffff;
	uint32_t end = 0xff;
	
	printf("begin: %u\n", begin);
	printf("end:   %u\n", end);
	printf("diff: %u\n", end - begin);
	
	return 0;
}