Submission #421141

#	Time	Username	Problem	Language	Result	Execution time	Memory
421141		dxz05	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	2 ms	468 KiB

messy

#include <bits/stdc++.h>
#include "messy.h"

using namespace std;

int n;
vector<int> p;

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

    int m = (l + r) >> 1;

    string s(n, '1');
    for (int i = l; i <= r; i++) s[i] = '0';

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


    add(l, m);
    add(m + 1, r);
}

void build(int l, int r, vector<int> v){
    if (l == r){
        p[v[0]] = l;
        return;
    }

    vector<int> lf, rg;

    string s(n, '1');
    for (int i : v) s[i] = '0';

    for (int i : v){
        s[i] = '1';

        if (check_element(s)){
            lf.push_back(i);
        } else rg.push_back(i);

        s[i] = '0';
    }

    int m = (l + r) >> 1;
    build(l, m, lf);
    build(m + 1, r, rg);
}

vector<int> restore_permutation(int _n, int w, int r) {
    n = _n;
    p.resize(n);

    add(0, n - 1);

    compile_set();

    vector<int> v(n);
    for (int i = 0; i < n; i++) v[i] = i;

    build(0, n - 1, v);

    return p;
}

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