Submission #534018

#	Time	Username	Problem	Language	Result	Execution time	Memory
534018		sliviu	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	2 ms	460 KiB

messy

#include "messy.h"
#include <bits/stdc++.h>

using namespace std;

int n;
vector<int> ans;

void build(int left = 0, int right = n - 1, string cur = string(n, '0')) {
	if (left == right)
		return;
	int m = (left + right) / 2;
	for (int i = left; i <= m; ++i) {
		cur[i] = '1';
		add_element(cur);
		cur[i] = '0';
	}
	cur = string(n, '0');
	for (int i = m + 1; i <= right; ++i)
		cur[i] = '1';
	build(left, m, cur);
	cur = string(n, '0');
	for (int i = left; i <= m; ++i)
		cur[i] = '1';
	build(m + 1, right, cur);
}

void find(int left = 0, int right = n - 1, vector<int> pos = ans, string cur = string(n, '0')) {
	if (left == right) {
		ans[pos[0]] = left;
		return;
	}
	vector<int> l, r;
	int m = (left + right) / 2;
	for (auto x : pos) {
		cur[x] = '1';
		if (check_element(cur))
			l.emplace_back(x);
		else
			r.emplace_back(x);
		cur[x] = '0';
	}
	cur = string(n, '0');
	for (auto x : r)
		cur[x] = '1';
	find(left, m, l, cur);
	cur = string(n, '0');
	for (auto x : l)
		cur[x] = '1';
	find(m + 1, right, r, cur);
}

vector<int> restore_permutation(int N, int w, int r) {
	n = N;
	ans.resize(n);
	build();
	compile_set();
	iota(ans.begin(), ans.end(), 0);
	find();
	return ans;
}

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