Submission #1156816

#	Time	Username	Problem	Language	Result	Execution time	Memory
1156816		Doncho_Bonboncho	Unscrambling a Messy Bug (IOI16_messy)	C++20	49 / 100	1 ms	328 KiB

messy

#include <algorithm>
#include <bits/stdc++.h>
#include <cstring>
#include <numeric>
#include <string>
#include <utility>
#include <vector>

#include "messy.h"
using namespace std;

#ifndef LOCAL
#define cerr if( false ) cerr
#endif

#define out(x) #x << " = " << x << "  "

std::vector<int> restore_permutation(int n, int w, int r) {

    std::vector< int > ind( n );
    std::iota( ind.begin(), ind.end(), 0 );

    mt19937 gen( 1337 );
    std::shuffle( ind.begin(), ind.end(), gen );

    cerr << " ind : " << endl;
    for( int i=0 ; i < n ; i++ ) cerr << ind[i] << " ";
    cerr << endl << endl;

    for( int i=0 ; i < n-1 ; i++ ){
        std::string curr = "";
        for( int j=0 ; j < n ; j++ ) curr += "0";
        for( int j=0 ; j <= i ; j++ ){
            curr[ ind[j] ] = '1';
        }
        cerr << out(curr ) << endl;
        add_element( curr );
    }

    compile_set();

    std::vector< int > unKnown( n );
    std::iota( unKnown.begin(), unKnown.end(), 0 );
    std::string base = "";

    std::vector< int > nas( n );

    for( int i=0 ; i < n ; i++ ) base += "0";

    for( int i=0 ; i < n -1 ; i++ ){
        for( int j=0 ; j < (int)unKnown.size() ; j++ ){
            std::string curr = base;
            curr[ unKnown[j] ] = '1';
            cerr << " ? " << out( curr ) << endl;
            if( check_element( curr ) ){

                //nas[i] = unKnown[j];
                nas[ unKnown[j] ] = ind[i];
                //nas[ unKnown[j] ] = ind[ ind[i] ];
                cerr << out( i ) << out( ind[i] ) << out( unKnown[j] ) << endl;
                base = curr;

                std::swap( unKnown[j], unKnown.back() );
                unKnown.pop_back();
                break;
            }
        }

        for( auto j : unKnown) cerr << j << " " ;
        cerr << endl << endl;
    }

    //nas[n-1] = unKnown[0];
    nas[ unKnown[0] ] = ind[n-1];
    cerr << out( unKnown[0] ) << out( ind[n-1] ) << endl;

    //std::cout << n << " " << w << " " << r << endl;
    /*
       for( auto j : nas ) cerr << j << " ";
       cerr << endl;
     */

    return nas;
}

Compilation message (stderr)

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

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