Submission #403652

#	Time	Username	Problem	Language	Result	Execution time	Memory
403652		hltk	Cave (IOI13_cave)	C++17	100 / 100	1048 ms	452 KiB

cave

#include <bits/stdc++.h>
using namespace std;
#include "cave.h"
void exploreCave(int n) {
	auto query = [&](vector<int> x, int fill, int lim) {
		for (int i = 0; i < n; ++i) {
			if (x[i] == -1) x[i] = i < lim ? !fill : fill;
		}
		int ret = tryCombination(x.data());
		return ret == -1 ? n : ret;
	};
	vector<int> s(n, -1);
	vector<int> d(n, -1);
	for (int i = 0; i < n; ++i) {
		int fill = query(s, 0, 0) > i;
		int l = 1, r = n;
		while (l < r) {
			int m = (l + r) / 2;
			if (query(s, fill, m) > i) r = m;
			else l = m + 1;
		}
		s[l - 1] = !fill;
		d[l - 1] = i;
	}
	answer(s.data(), d.data());
}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24