Submission #369857

#	Time	Username	Problem	Language	Result	Execution time	Memory
369857		Jasiekstrz	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	3 ms	492 KiB

messy

#include<bits/stdc++.h>
#include "messy.h"
#define fi first
#define se second
using namespace std;
string s;
vector<int> ans;
inline void swp(int x)
{
	s[x]=(s[x]=='0' ? '1':'0');
	return;
}
void add(int r,int m,int n)
{
	if(m==n)
		return;
	int i;
	for(i=r+m;i<n;i+=2*m)
	{
		swp(i);
		add_element(s);
		swp(i);
	}
	for(i=r+m;i<n;i+=2*m)
		swp(i);
	add(r,2*m,n);
	for(i=r;i<n;i+=m)
		swp(i);
	add(r+m,2*m,n);
	for(i=r;i<n;i+=2*m)
		swp(i);
	return;
}
void check(vector<int> av,int w,int p)
{
	if(av.size()==1)
	{
		ans[av[0]]=w;
		return;
	}
	vector<int> tmp[2];
	for(auto v:av)
	{
		swp(v);
		tmp[check_element(s)].push_back(v);
		swp(v);
	}
	for(auto v:tmp[1])
		swp(v);
	check(tmp[0],w,2*p);
	for(auto v:av)
		swp(v);
	check(tmp[1],w+p,2*p);
	for(auto v:tmp[0])
		swp(v);
	return;
}
vector<int> restore_permutation(int n,int w,int r)
{
	s=string(n,'0');
	ans.resize(n);
	add(0,1,n);
	compile_set();
	vector<int> tmp(n);
	for(int i=0;i<n;i++)
		tmp[i]=i;
	check(tmp,0,1);
	return ans;
}

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