Submission #720314

#	Time	Username	Problem	Language	Result	Execution time	Memory
720314		hoainiem	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	2 ms	512 KiB

messy

#include <bits/stdc++.h>

#include "messy.h"
using namespace std;
string zer;
vector<int>ds, ans;
int N;
void dq(int l, int r, string cur){
    if (l == r)
        return;
    int mid = (l + r) >> 1;
    for (int i = l; i <= mid; i++){
        cur[i] = '1';
        add_element(cur);
        cur[i] = '0';
    }
    for (int i = l; i <= mid; i++)
        cur[i] = '1';
    dq(mid + 1, r, cur);
    for (int i = 0; i < N; i++)
        cur[i] = '0' + '1' - cur[i];
    dq(l, mid, cur);
}
void calc(int l, int r, vector<int> vt, string cur){
    if (l == r){
        ans[*vt.begin()] = l;
        return;
    }
    int mid = (l + r) >> 1;
    vector<int>lc, rc;
    random_shuffle(vt.begin(), vt.end());
    for (int tmp : vt){
        cur[tmp] = '1';
        if ((int)lc.size() != mid - l + 1 && check_element(cur))
            lc.push_back(tmp);
        else
            rc.push_back(tmp);
        cur[tmp] = '0';
    }
    for (int tmp : lc)
        cur[tmp] = '1';
    calc(mid + 1, r, rc, cur);
    for (int i = 0; i < N; i++)
        cur[i] = '0' + '1' - cur[i];
    calc(l, mid, lc, cur);
}
std::vector<int> restore_permutation(int n, int w, int r) {
    N = n;
    ans.resize(n);
    zer.resize(n, '0');
    dq(0, n - 1, zer);
    compile_set();
    for (int i = 0; i < n; i++)
        ds.push_back(i);
    calc(0, n - 1, ds, zer);
    return ans;
}

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