Submission #1236224

#	Time	Username	Problem	Language	Result	Execution time	Memory
1236224		kaiboy	Question (Grader is different from the original contest) (CEOI14_question_grader)	C++20	27 / 100	705 ms	39652 KiB

encoder

int encode(int n, int a, int b) {
	int h = 0;
	while ((a >> h & 1) == (b >> h & 1))
		h++;
	return (h << 1 ^ a >> h & 1) + 1;
}

decoder

bool decode(int n, int c, int x) {
	x--;
	int h = x >> 1, d = x & 1;
	return (c >> h & 1) == d;
}

• Subtask 1: 27 / 100