제출 #1358971

#제출 시각아이디문제언어결과실행 시간메모리
1358971njoopUnscrambling a Messy Bug (IOI16_messy)C++20
100 / 100
1 ms580 KiB
#include <bits/stdc++.h>
#include "messy.h"
using namespace std;

vector<int> p;

void add(int l, int r, string s) {
    if(l == r) return;
    int mid = (l+r)/2;
    for(int i=l; i<=mid; i++) {
        s[i] = '1';
        add_element(s);
        s[i] = '0';
    }
    for(int i=l; i<=mid; i++) s[i] = '1';
    add(mid+1, r, s);
    for(int i=l; i<=mid; i++) s[i] = '0';
    for(int i=mid+1; i<=r; i++) s[i] = '1';
    add(l, mid, s);
}

void query(int l, int r, string s) {
    if(l == r) {
        for(int i=0; i<s.size(); i++) {
            if(s[i] == '0') p[i] = l;
        }
        return;
    }
    int mid = (l+r)/2;
    vector<int> f, nf;
    for(int i=0; i<s.size(); i++) {
        if(s[i] == '1') continue;
        s[i] = '1';
        if(check_element(s)) f.push_back(i);
        else nf.push_back(i);
        s[i] = '0';
    }
    for(auto i: f) s[i] = '1';
    query(mid+1, r, s);
    for(auto i: f) s[i] = '0';
    for(auto i: nf) s[i] = '1';
    query(l, mid, s);
}

std::vector<int> restore_permutation(int n, int w, int r) {
    string s;
    s.assign(n, '0');
    p.assign(n, 0);
    add(0, n-1, s);
    compile_set();
    query(0, n-1, s);
    return p;
}
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