Submission #135487

#	Time	Username	Problem	Language	Result	Execution time	Memory
135487		Mahdi_Jfri	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	4 ms	508 KiB

messy

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

using namespace std;

#define ll long long
#define pb push_back

const int maxn = 2e2 + 20;

int res[maxn];

void solve1(int n , int l , int r)
{
	int m = (r - l);

	string x = string(l , '1') , y = string(n - r , '1');
	if(m == 2)
	{
		add_element(x + "10" + y);
		return;
	}

	m = (l + r) / 2;
	for(int i = l; i < m; i++)
	{
		string tmp = x + string(r - l , '0') + y;
		tmp[i] = '1';
		add_element(tmp);
	}

	solve1(n , l , m);
	solve1(n , m , r);
}

bool check(string tmp , int k)
{
	tmp[k] = '1';
	bool f = check_element(tmp);
	return f;
}

void solve2(int n , int l , int r , vector<int> candid)
{
	string tmp = string(n , '1');
	for(auto x : candid)
		tmp[x] = '0';

	assert((int)candid.size() == r - l);

	if(r - l == 2)
	{
		if(!check(tmp , candid[0]))
			swap(candid[0] , candid[1]);
		res[l] = candid[0];
		res[l + 1] = candid[1];
		return;
	}

	vector<int> x , y;
	for(int i = 0; i < r - l; i++)
	{
		if(check(tmp , candid[i]))
			x.pb(candid[i]);
		else
			y.pb(candid[i]);
	}

	int m = (l + r) / 2;
	solve2(n , l , m , x);
	solve2(n , m , r , y);
}

vector<int> restore_permutation(int n, int w, int r)
{
	solve1(n , 0 , n);
	compile_set();

	vector<int> candid;
	for(int i = 0; i < n; i++)
		candid.pb(i);
	solve2(n , 0 , n , candid);

	for(int i = 0; i < n; i++)
		candid[res[i]] = i;
	return candid;
}

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