Submission #66964

#	Time	Username	Problem	Language	Result	Execution time	Memory
66964		fallingstar	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	3 ms	512 KiB

messy

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

using namespace std;

// [l..r)
void Add(int l, int r, string base)
{
	if (l + 1 == r) return;
	int mid = (l + r) / 2;
	for (int i = l; i < mid; ++i)
	{
		base[i] = '1';
		add_element(base.c_str());
		base[i] = '0';
	}
	
	// fill one side, recurse in other side
	fill(base.begin() + l, base.begin() + mid, '1');
	Add(mid, r, base);
	fill(base.begin() + l, base.begin() + mid, '0');
	fill(base.begin() + mid, base.begin() + r, '1');
	Add(l, mid, base);
}

vector<int> ans;

void Solve(int l, int r, vector<int> miss, string base)
{
	if (l + 1 == r)
	{
		ans[miss[0]] = l;
		return;
	}
	vector<int> grL, grR;
	for (int x: miss)
	{
		base[x] = '1';
		if (check_element(base.c_str())) grL.push_back(x);
		else grR.push_back(x);
		base[x] = '0';
	}
	int mid = (l + r) / 2;

	// fill one side, recurse in other side
	for (int x: grR) base[x] = '1';
	Solve(l, mid, grL, base);
	for (int x: grR) base[x] = '0';
	for (int x: grL) base[x] = '1';
	Solve(mid, r, grR, base);
}

vector<int> restore_permutation(int n, int w, int r) {
    Add(0, n, string(n, '0'));

    compile_set();

    ans.resize(n);
    vector<int> all;
    for (int i = 0; i < n; ++i) all.push_back(i);
    Solve(0, n, all, string(n, '0'));
    return ans;
}

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