Submission #274357

#	Time	Username	Problem	Language	Result	Execution time	Memory
274357		stoyan_malinin	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	5 ms	580 KiB

messy

#include "messy.h"
//#include "grader.cpp"

#include <set>
#include <vector>
#include <iostream>

using namespace std;

vector <int> ansPerm;

void gen(int l, int r, int n)
{
    if(l==r) return;

    string curr = "";
    for(int i = 0;i<n;i++)
    {
        if(i>=l && i<=r) curr += "0";
        else curr += "1";
    }

    for(int i = l;i<=(l+r)/2;i++)
    {
        curr[i] = '1';
        add_element(curr);
        curr[i] = '0';
    }

    gen(l, (l+r)/2, n);
    gen((l+r)/2+1, r, n);
}

void solve(int l, int r, set <int> s, int n)
{
    if(l==r)
    {
        ansPerm[*s.begin()] = l;
        return;
    }

    set <int> lhs, rhs;
    for(int x: s)
    {
        string curr = "";
        for(int i = 0;i<n;i++)
        {
            if(s.count(i)==false) curr += "1";
            else
            {
                if(i==x) curr += "1";
                else curr += "0";
            }
        }

        if(check_element(curr)==true) lhs.insert(x);
        else rhs.insert(x);
    }

    solve(l, (l+r)/2, lhs, n);
    solve((l+r)/2+1, r, rhs, n);
}

vector<int> restore_permutation(int n, int w, int r)
{
    gen(0, n-1, n);
    compile_set();

    ansPerm.resize(n);
    set <int> s;
    for(int i = 0;i<n;i++) s.insert(i);

    solve(0, n-1, s, n);
    return ansPerm;
}

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