Submission #781866

#	Time	Username	Problem	Language	Result	Execution time	Memory
781866		ymm	기억 압축 (JOI15_memory)	C++17	100 / 100	1818 ms	284048 KiB

memory

#include "Memory_lib.h"

namespace {
	int get_p(int x) { return x % 100; }
	int get_phase(int x) { return x / 100 % 2; }
	int get_p2(int x) { return x / 200 % 100 - 1; }
	int get_depth(int x) { return x / 20000 % 100; }
	char get_ch(int x) { return x / 2000000? '<': '['; }

	int make(int p, int phase, int p2, int depth, int c) {
		c = c == '<' || c == '>';
		return p + phase * 100 + (p2 + 1) * 200 + depth * 20000 + c * 2000000;
	}

	char get(int i, int phase, int len) {
		if (!phase)
			return Get(i+1);
		char c = Get(len - i);
		switch (c) {
		case '<': return '>';
		case '>': return '<';
		case '[': return ']';
		case ']': return '[';
		}
		return -1;
	}
}

int Memory(int N, int M) {
	int p = get_p(M);
	int phase = get_phase(M);
	int p2 = get_p2(M);
	int depth = get_depth(M);
	char ch = get_ch(M);
	if (p >= N)
		return 0;
	if (p2 >= p)
		return 0;
	if (p2 == -1) {
		char c = get(p, phase, N);
		if (c == '[' || c == '<') {
			if (p == N-1)
				return -2;
			else
				return make(p+1, phase, -1, 0, 0);
		}
		if (p == 0)
			return -2;
		return make(p, phase, p-1, 0, c);
	}
	char c = get(p2, phase, N);
	if (c == ']' || c == '>') {
		if (p2 == 0)
			return -2;
		return make(p, phase, p2-1, depth+1, ch);
	}
	if (depth) {
		if (p2 == 0)
			return -2;
		return make(p, phase, p2-1, depth-1, ch);
	}
	if (c != ch)
		return -2;
	if (p == N-1) {
		if (phase == 0)
			return make(0, 1, -1, 0, 0);
		else
			return -1;
	}
	return make(p+1, phase, -1, 0, 0);
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 10 / 10
• Subtask 6: 60 / 60