Submission #889684

#	Time	Username	Problem	Language	Result	Execution time	Memory
889684		Faisal_Saqib	Unscrambling a Messy Bug (IOI16_messy)	C++17	0 / 100	1 ms	364 KiB

messy

#pragma once

#include <vector>
#include <string>
#include <set>
using namespace std;
void add_element(std::string x);
bool check_element(std::string x);
void compile_set();

std::vector<int> restore_permutation(int n, int w, int r)
{
	string s(n,'0');
	set<string> aft,bef;
	vector<int> p;
	for(int i=0;i<n;i++)
		p.push_back(i);
	for(int i=0;i<(n-1);i++)
	{
		s[i]='1';
		add_element(s);
		bef.insert(s);
	}
	compile_set();
	for(int mask=0;mask<(1<<n);mask++)
	{
		string t="";
		for(int j=0;j<n;j++)
		{
			if(mask&(1<<j))
				t+='1';
			else
				t+='0';
		}
		if(check_element(t))
		{
			aft.insert(t);
		}
	}
	for(int i=0;i<n;i++)
	{
		for(int j=i+1;j<n;j++)
		{
			bool pos=1;
			for(auto sp:bef)
			{
				swap(sp[i],sp[j]);
				if(aft.find(sp)==aft.end())
				{
					swap(sp[i],sp[j]);
					pos=0;
					break;
				}
				swap(sp[i],sp[j]);
			}
			if(pos)
			{
				swap(p[i],p[j]);
				return p;
			}
		}
	}
	return {};
}

Compilation message (stderr)

messy.cpp:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 18
• Subtask 3: 0 / 11
• Subtask 4: 0 / 21
• Subtask 5: 0 / 30