Submission #206970

#	Time	Username	Problem	Language	Result	Execution time	Memory
206970		autumn_eel	Unscrambling a Messy Bug (IOI16_messy)	C++14	20 / 100	6 ms	376 KiB

messy

#include "messy.h"
#include <bits/stdc++.h>
#define rep(i,n)for(int i=0;i<(n);i++)
using namespace std;
typedef pair<int,int>P;

vector<int> restore_permutation(int n, int w, int r) {
	if(n==8){
		map<vector<string>,P>mp;
		vector<string>u={
			"00001111",
			"00110011",
			"01010101",
			"10001111",
			"11001111",
		};
		rep(i,n)for(int j=i+1;j<n;j++){
			vector<string>v=u;
			for(auto&s:v)swap(s[i],s[j]);
			sort(v.begin(),v.end());
			if(mp.count(v))abort();
			mp[v]=P(i,j);
		}
		for(auto&s:u)add_element(s);
		compile_set();
		vector<string>t;
		rep(i,1<<8){
			string s;
			rep(j,8){
				s+=(i>>j&1)+'0';
			}
			if(check_element(s))t.push_back(s);
		}
		sort(t.begin(),t.end());
		vector<int>ans(n);rep(i,n)ans[i]=i;
		P p=mp[t];
		swap(ans[p.first],ans[p.second]);
		return ans;
	}
	return {};
}

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