Submission #1294148

#	Time	Username	Problem	Language	Result	Execution time	Memory
1294148		vincentbucourt1	Unscrambling a Messy Bug (IOI16_messy)	C++20	100 / 100	2 ms	588 KiB

messy

#include "messy.h"
#include <bits/stdc++.h>
using namespace std;

int N;
vector<int> perm;

void addElemPos (vector<int>& posOn) {
    string elem;
    for (int i = 0; i < N; i++) elem += '0';
    for (int i : posOn) elem[i] = '1';
    add_element(elem);
}
bool checkElemPos (vector<int>& posOn) {
    string elem;
    for (int i = 0; i < N; i++) elem += '0';
    for (int i : posOn) elem[i] = '1';
    return check_element(elem);
}
void printElemPos (vector<int>& posOn) {
    string elem;
    for (int i = 0; i < N; i++) elem += '0';
    for (int i : posOn) elem[i] = '1';
    cout << elem << "\n";
}

void addElemVec (vector<int>& vecElem) {
    assert((int)vecElem.size() == N);
    string elem;
    for (int i = 0; i < N; i++) elem += (vecElem[i] + '0');
    add_element(elem);
}
bool checkElemVec (vector<int>& vecElem) {
    assert((int)vecElem.size() == N);
    string elem;
    for (int i = 0; i < N; i++) elem += (vecElem[i] + '0');
    return check_element(elem);
}

void insert (int l, int r) {
    if (r-l+1 <= 2) {
        return;
    }

    vector<int> posOn;
    int mid = (r+l)/2, midL = (l + mid)/2, midR = (r + mid+1)/2;
    for (int i = mid + 1; i <= r; i++) {
        posOn.emplace_back(i);
    }
    for (int i = l; i <= midL; i++) {
        posOn.emplace_back(i);
        addElemPos(posOn);
        // printElemPos(posOn);
        posOn.pop_back();
    }

    posOn.clear();
    for (int i = l; i <= mid; i++) {
        posOn.emplace_back(i);
    }
    for (int i = mid+1; i <= midR; i++) {
        posOn.emplace_back(i);
        addElemPos(posOn);
        // printElemPos(posOn);
        posOn.pop_back();
    }

    if (r-l+1 > 4) {
        insert(l, mid);
        insert(mid + 1, r);
    }
}

int t = 0;
void query (vector<int>& posL, vector<int>& posR) {
    int l = (int)posL.size(), r = (int)posR.size();
    if (l == 1 && r == 1) {
        perm[posL[0]] = t++;
        perm[posR[0]] = t++;
        return;
    }

    vector<int> posOn;
    vector<int> posLL, posLR;
    for (int pR : posR) posOn.emplace_back(pR);
    for (int pL : posL) {
        posOn.emplace_back(pL);
        if (checkElemPos(posOn)) {
            posLL.emplace_back(pL);
        }
        else {
            posLR.emplace_back(pL);
        }
        posOn.pop_back();
    }
    assert((int)posLL.size() <= (int)posL.size() / 2);
    assert((int)posLR.size() <= (int)posL.size() / 2);
    query(posLL, posLR);

    posOn.clear();
    vector<int> posRL, posRR;
    for (int pL : posL) posOn.emplace_back(pL);
    for (int pR : posR) {
        posOn.emplace_back(pR);
        if (checkElemPos(posOn)) {
            posRL.emplace_back(pR);
        }
        else {
            posRR.emplace_back(pR);
        }
        posOn.pop_back();
    }
    query(posRL, posRR);
}

std::vector<int> restore_permutation(int n, int w, int r) {
    N = n;
    for (int i = 0; i < N/2; i++) {
        vector<int> p = {i};
        addElemPos(p); 
        // printElemPos(p);
    }
    insert(0, N-1);
    compile_set();
    vector<int> posL, posR;
    for (int i = 0; i < N; i++) {
        vector<int> p = {i};
        if (checkElemPos(p)) {
            posL.emplace_back(i);
        }
        else {
            posR.emplace_back(i);
        }
    }
    perm.resize(N);
    query(posL, posR);
    return perm;
}

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: 21 / 21
• Subtask 5: 30 / 30