제출 #388847

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
388847		Keshi	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	3 ms	464 KiB

messy

//In the name of God
#include <bits/stdc++.h>
#include "messy.h"
using namespace std;

typedef int ll;
typedef pair<ll, ll> pll;

#define pb push_back
#define F first
#define S second
#define Mp make_pair
#define Sz(x) ll((x).size())
#define all(x) (x).begin(), (x).end()

ll n;

void ask(ll l, ll r){
	if(r - l == 1) return;
	string s;
	for(ll i = 0; i < n; i++){
		if(l <= i && i < r) s += '0';
		else s += '1';
	}
	ll mid = (l + r) >> 1;
	s[l] = '1';
//	cout << "? " << s << "\n";
	add_element(s);
	for(ll i = l + 1; i < mid; i++){
		s[i - 1] = '0';
		s[i] = '1';
//		cout << "? " << s << "\n";
		add_element(s);
	}
	ask(l, mid);
	ask(mid, r);
	return;
}

vector<ll> solve(ll l, ll r, vector<ll> b){
	/*cout << "^ " << l << " " << r << " -> ";
	for(ll i : b){
		cout << i << " ";
	}
	cout << "\n";*/
	if(r - l == 1) return b;
	vector<bool> vis(n);
	vector<bool> ok(r - l);
	for(ll i : b){
		vis[i] = 1;
	}
	string s;
	for(ll i = 0; i < n; i++){
		if(!vis[i]) s += '1';
		else s += '0';
	}
	s[b[0]] = '1';
	if(check_element(s)) ok[0] = 1;
	for(ll i = 1; i < r - l; i++){
		s[b[i - 1]] = '0';
		s[b[i]] = '1';
		if(check_element(s)) ok[i] = 1;
	}
	ll mid = (l + r) >> 1;
	vector<ll> b1, b2;
	for(ll i = 0; i < r - l; i++){
		if(ok[i]) b1.pb(b[i]);
		else b2.pb(b[i]);
	}
	vector<ll> c1 = solve(l, mid, b1);
	vector<ll> c2 = solve(mid, r, b2);
	vector<ll> c;
	for(ll i : c1){
		c.pb(i);
	}
	for(ll i : c2){
		c.pb(i);
	}
	return c;
}

vector<int> restore_permutation(int N, int w, int r) {
	n = N;
	ask(0, n);
	compile_set();
	vector<int> a;
	for(ll i = 0; i < n; i++){
		a.pb(i);
	}
    vector<ll> c = solve(0, n, a);
	vector<ll> ans(n);
	for(ll i = 0; i < n; i++){
		ans[c[i]] = i;
	}
	return ans;
}

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