Submission #310206

#	Time	Username	Problem	Language	Result	Execution time	Memory
310206		lohacho	Unscrambling a Messy Bug (IOI16_messy)	C++14	100 / 100	3 ms	512 KiB

messy

#include <vector>

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

using namespace std;

using LL = long long;
const int MOD = (int)1e9 + 7;
int N;

void push(int s, int e){
    if(s == e) return;
    string in;
    for(int i = 0; i < N; ++i){
        if(i < s || i > e) in += '1';
        else in += '0';
    }
    for(int i = s; i <= (s + e) / 2; ++i){
        in[i] = '1';
        add_element(in);
        in[i] = '0';
    }
    push(s, (s + e) / 2), push((s + e) / 2 + 1, e);
}

std::vector<int> restore_permutation(int n, int w, int r) {
    N = n;
    push(0, N - 1);
    compile_set();
    vector<vector<int>> now, nxt;
    vector<int> all;
    for(int i = 0; i < n; ++i){
        all.push_back(i);
    }
    now.push_back(all);
    for(int j = n; j > 1; j >>= 1){
        for(int i = 0; i < (int)now.size(); ++i){
            vector<int> l, r;
            string in;
            for(int x = 0; x < n; ++x){
                in += '1';
            }
            for(auto&x:now[i]){
                in[x] = '0';
            }
            for(auto&x:now[i]){
                in[x] = '1';
                if(check_element(in)){
                    l.push_back(x);
                }
                else{
                    r.push_back(x);
                }
                in[x] = '0';
            }
            nxt.push_back(l), nxt.push_back(r);
        }
        now = nxt;
        nxt.clear();
    }
    vector<int> ans(n);
    for(int i = 0; i < n; ++i){
        ans[now[i].front()] = i;
    }
    return ans;
}

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