Submission #830029

#	Time	Username	Problem	Language	Result	Execution time	Memory
830029		Liudas	Unscrambling a Messy Bug (IOI16_messy)	C++17	49 / 100	1 ms	340 KiB

messy

#include <vector>
#include <cstdio>
#include <string>
#include <set>
#include <cstdlib>
#include <iostream>
#include "messy.h"
#include <numeric>
#include <algorithm>
#include <random>
#include <chrono>
using namespace std;
vector<int> restore_permutation(int N, int W, int R){
    string s = string(N, '0'), t = string(N, '0');
    for(int i = 0; i < N/2; i ++){
        s[i] = '1';
        //cout << s << endl;
        add_element(s);
        s[i] = '0';
        s[N-i-1] = '1';
        //cout << s << endl;
        add_element(s);
        s[i] = '1';
    }
    string ss = string(N, '1');
    ss[0] = '0';
    add_element(ss);
    t[0] = '1';
    for(int i = 0; i < N/2-1; i ++){
        t[i + 1] = '1';
        //cout << t << endl;
        add_element(t);
        t[i] = '0';
    }
    vector<int> order(N);
    iota(order.begin(), order.end(), 0);
    compile_set();
    string ans = string(N, '0');
    vector<vector<int>> pos(N/2);
    vector<int> perm(N, -1);
    for(int i = 0; i < N/2; i ++){
        string temp = ans;
        for(int j = 0; j < N; j ++){
            if(ans[j] == '0'){
                temp[j] = '1';
                bool good = check_element(temp);
                if(good){
                    ans[j] = '1';
                    pos[i].push_back(j);
                }
                temp[j] = '0';
            }
        }
    }
    perm[pos[0][0]] = 0;
    perm[pos[0][1]] = N-1;
    ss[0] = '1';
    ss[pos[0][0]] = '0';
    if(!check_element(ss)){
        swap(perm[pos[0][0]], perm[pos[0][1]]);
    }
    for(int i = 1; i < N/2; i ++){
        string temp = string(N, '0');
        temp[find(perm.begin(), perm.end(), i-1)-perm.begin()] = '1';
        temp[pos[i][0]] = '1';
        //cout << temp << endl;
        if(check_element(temp)){
            //cout << "WTF" << endl;
            perm[pos[i][0]] = i;
            perm[pos[i][1]] = N-i-1;
        }
        else{
            //cout << "LOL" << endl;
            perm[pos[i][1]] = i;
            perm[pos[i][0]] = N-i-1;
        }
    }
    return perm;
}

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