Submission #32024

#	Time	Username	Problem	Language	Result	Execution time	Memory
32024		imeimi2000	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	17 ms	640 KiB

messy

#include <vector>
#include "messy.h"

using namespace std;

string now;
vector<int> per;
vector<int> ans;
void dnc1(int s, int e) {
	if (s == e) return;
	int m = (s + e) / 2;
	for (int i = m + 1; i <= e; ++i) {
		now[i] = '1';
		add_element(now);
		now[i] = '0';
	}
	for (int i = m + 1; i <= e; ++i) now[i] = '1';
	dnc1(s, m);
	for (int i = m + 1; i <= e; ++i) now[i] = '0';
	now[s] = '1';
	dnc1(m + 1, e);
	now[s] = '0';
}

vector<int> group[1024];
void dnc2(int idx, int s, int e) {
	if (s == e) {
		per[s] = group[idx].back();
		return;
	}
	int m = (s + e) / 2;
	for (int i : group[idx]) {
		now[i] = '1';
		if (check_element(now)) group[idx * 2 + 1].push_back(i);
		else group[idx * 2].push_back(i);
		now[i] = '0';
	}
	for (int i : group[idx * 2 + 1]) now[i] = '1';
	dnc2(idx * 2, s, m);
	for (int i : group[idx * 2 + 1]) now[i] = '0';
	now[per[s]] = '1';
	dnc2(idx * 2 + 1, m + 1, e);
	now[per[s]] = '0';
}

std::vector<int> restore_permutation(int n, int w, int r) {
	per.resize(n);
	ans.resize(n);
	now.resize(n, '0');
	dnc1(0, n - 1);
	compile_set();
	group[1].resize(n);
	for (int i = 0; i < n; ++i) group[1][i] = i;
	dnc2(1, 0, n - 1);
	for (int i = 0; i < n; ++i) ans[per[i]] = i;
	return ans;
}

• Subtask 1: 20 / 20
• Subtask 2: 18 / 18
• Subtask 3: 11 / 11
• Subtask 4: 21 / 21
• Subtask 5: 30 / 30