Submission #1022548

#	Time	Username	Problem	Language	Result	Execution time	Memory
1022548		mansur	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	2 ms	604 KiB

messy

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

using namespace std;

#define rall(s) s.rbegin(), s.rend()
#define all(s) s.begin(), s.end()
#define sz(s) (int)s.size()
#define s second 
#define f first   

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int N = 2e5 + 5;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

string h = "";
vector<int> p;

void bld(int l, int r) {
    if (l == r) return;
    int m = (l + r) / 2;
    for (int i = l; i <= m; i++) {
        h[i] = '1';
        add_element(h);
        h[i] = '0';
    }
    for (int i = m + 1; i <= r; i++) h[i] = '1';
    bld(l, m);
    for (int i = l; i <= r; i++) {
        if (i <= m) h[i] = '1';
        else h[i] = '0';
    }
    bld(m + 1, r);
}

void fnd(int l, int r, vector<int> &s) {
    if (l == r) {
        p[s[0]] = l;
        return;
    }
    int m = (l + r) / 2;
    vector<int> tl, tr;
    for (int i: s) {
        h[i] = '1';
        if (check_element(h)) tl.push_back(i);
        else tr.push_back(i);
        h[i] = '0';
    }
    for (int i: tr) h[i] = '1';
    fnd(l, m, tl);
    for (int i: tl) h[i] = '1';
    for (int i: tr) h[i] = '0';
    fnd(m + 1, r, tr);
}

vector<int> restore_permutation(int n, int w, int r) {
    for (int i = 0; i < n; i++) h += '0';
    p.resize(n);
    bld(0, n - 1);
    compile_set();
    vector<int> s;
    for (int i = 0; i < n; i++) {
        s.push_back(i);
        h[i] = '0';
    }
    fnd(0, n - 1, s);
    return p;
}

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