Submission #622451

#	Time	Username	Problem	Language	Result	Execution time	Memory
622451		Lucpp	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	3 ms	476 KiB

messy

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

void do_add(string s, int l, int r){
    if(l == r) return;
    int m = (l+r)/2;
    for(int i = l; i <= r; i++) s[i] = '0';
    for(int i = l; i <= m; i++){
        s[i] = '1';
        // cerr << s << "\n";
        add_element(s);
        s[i] = '0';
    }
    for(int i = l; i <= m; i++) s[i] = '1';
    do_add(s, m+1, r);
    for(int i = l; i <= m; i++) s[i] = '0';
    for(int i = m+1; i <= r; i++) s[i] = '1';
    do_add(s, l, m);
}

vector<int> p;

void solve(string s, vector<int> v, int res, int val){
    if(val == 0){
        p[v[0]] = res;
        return;
    }
    for(int i : v) s[i] = '0';
    vector<int> a, b;
    for(int i : v){
        s[i] = '1';
        if(check_element(s)) a.push_back(i);
        else b.push_back(i);
        s[i] = '0';
    }
    for(int i : a) s[i] = '1';
    solve(s, b, res+val, val/2);
    for(int i : a) s[i] = '0';
    for(int i : b) s[i] = '1';
    solve(s, a, res, val/2);
}

vector<int> restore_permutation(int n, int w, int r){
    w--, r--; // suppress warning
    string s(n, '0');
    do_add(s, 0, n-1);
    compile_set();
    vector<int> v(n);
    for(int i = 0; i < n; i++) v[i] = i;
    p.resize(n);
    solve(s, v, 0, n/2);
    return p;
}

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