Submission #138867

#	Time	Username	Problem	Language	Result	Execution time	Memory
138867		rondojim	Unscrambling a Messy Bug (IOI16_messy)	C++17	100 / 100	4 ms	632 KiB

messy

#include "messy.h"
#include <bits/stdc++.h>
#define eb emplace_back
using namespace std;
 
const int MAXN = 155;
 
int Ans[MAXN];
 
int N;
 
void make(int s, int e) {
	if(s == e) return;
	int m = (s+e) >> 1;
	string bstr;
	for(int i = 0; i < N; i++) bstr += "1";
	for(int i = s; i <= e; i++) bstr[i] = '0';
	for(int i = s; i <= m; i++) {
		string str = bstr;
		str[i] = '1';
		add_element(str);
	}
	make(s, m);
	make(m+1, e);
}
 
void solve(vector<int> V, int s, int e) {
	if(s == e) {
		Ans[s] = V[0];
		return;
	}
	int m = (s+e) >> 1;
	string bstr;
	for(int i = 0; i < N; i++) bstr += "1";
	for(int v : V) bstr[v] = '0';
 
	vector<int> VL, VR;
	for(int v : V) {
		string str = bstr;
		str[v] = '1';
		(check_element(str) ? VL : VR).eb(v);
	}
	solve(VL, s, m);
	solve(VR, m+1, e);
}
 
std::vector<int> restore_permutation(int n, int w, int r) {
	::N = n;
 
	make(0, N-1);
	compile_set();
	{
		vector<int> V;
		for(int i = 0; i < N; i++) V.eb(i);
		solve(V, 0, N-1);
	}
 
	vector<int> ret(N);
	for(int i = 0; i < N; i++) ret[Ans[i]] = i;
	return ret;
}

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