Submission #226851

#	Time	Username	Problem	Language	Result	Execution time	Memory
226851		VEGAnn	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	6 ms	640 KiB

messy

#include <bits/stdc++.h>
#include "messy.h"
#define PB push_back
using namespace std;
const int N = 128;
vector<int> seg[2][N], res, vc;
string s, l[N], r[N];
bool mrk[N];

std::vector<int> restore_permutation(int n, int w, int r) {
    int lg = 0;

    while ((1 << lg) < n)
        lg++;

    s = "";
    for (int i = 0; i < n; i++)
        s += "1";

    for (int it = 0; it < lg; it++){
        int len = n / (1 << (it + 1));

        for (int i = 0; i < n; i += len * 2){
            for (int j = 0; j < len + len; j++)
                s[i + j] = '0';

            for (int j = 0; j < len; j++){
                s[i + j] = '1';
                add_element(s);
                s[i + j] = '0';
            }

            for (int j = 0; j < len + len; j++)
                s[i + j] = '1';
        }
    }

    compile_set();

    for (int i = 0; i < n; i++)
        seg[0][0].PB(i);

    for (int it = 0; it < lg; it++){
        int par = (it & 1);
        int len = n / (1 << (it + 1));

        for (int i = 0; i < (1 << (it + 1)); i++)
            seg[par ^ 1][i].clear();

        fill(mrk, mrk + n, 0);

        for (int i = 0, id = 0; i < n; i += len * 2, id++){
            for (int x : seg[par][id])
                s[x] = '0';

            for (int x : seg[par][id]){
                s[x] = '1';

                if (check_element(s))
                    mrk[x] = 1;

                s[x] = '0';
            }

            for (int x : seg[par][id])
                s[x] = '1';
        }

        for (int id = 0, i = 0; i < n; id++, i += len * 2){
            int lf = id + id;
            int rt = id + id + 1;

            for (int x : seg[par][id])
                if (mrk[x])
                    seg[par ^ 1][lf].PB(x);
                else seg[par ^ 1][rt].PB(x);
        }
    }

    res.clear();
    vc.clear();

    for (int i = 0; i < n; i++)
        vc.PB(seg[lg & 1][i][0]);

    res.resize(n);

    for (int kl = 0; kl < 1; kl++){
        for (int i = 0; i < n; i++)
            res[vc[i]] = i;
        vc = res;
    }

    return res;
}

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