제출 #231261

#제출 시각아이디문제언어결과실행 시간메모리
231261islingrUnscrambling a Messy Bug (IOI16_messy)C++14
100 / 100
6 ms512 KiB
#include "messy.h"
#include <algorithm>
#include <iostream>
#include <vector>
 
using namespace std;

#define rep(i, a, b) for (auto i = (a); i < (b); ++i)

vector<int> restore_permutation(int n, int _, int __) {
	for (int sz = n; sz != 1; sz >>= 1) {
		for (int l = 0; l != n; l += sz) {
			string s(n, '1');
			rep(i, l, l + sz) s[i] = '0';
			rep(i, l, l + sz / 2) {
				s[i] = '1';
				add_element(s);
				s[i] = '0';
			}
		}
	}
 
	compile_set();
	
	vector<int> p(n); rep(i, 0, n) p[i] = i;
	for (int sz = n; sz != 1; sz >>= 1) {
		vector<bool> v(n);
		for (int l = 0; l != n; l += sz) {
			string s(n, '1');
			rep(i, l, l + sz) s[p[i]] = '0';
			rep(i, l, l + sz) {
				int j = p[i];
				s[j] = '1';
				v[j] = check_element(s);
				s[j] = '0';
			}
			partition(begin(p) + l, begin(p) + l + sz, [&v](int x) { return v[x]; });
		}
	}
 
	vector<int> pi(n);
	rep(i, 0, n) pi[p[i]] = i;
	return pi;
}
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