Submission #835421

#	Time	Username	Problem	Language	Result	Execution time	Memory
835421		pavement	Rarest Insects (IOI22_insects)	C++17	0 / 100	137 ms	424 KiB

insects

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

#define pb push_back

int min_cardinality(int N) {
	vector<int> v, alr_in;
	move_inside(0);
	v.pb(0);
	for (int i = 1; i < N; i++) {
		move_inside(i);
		if (press_button() != 1) {
			move_outside(i);
		} else {
			v.pb(i);
		}
	}
	int lo = 1, hi = N / (int)v.size(), ans = -1;
	while (lo <= hi) {
		int mid = (lo + hi) / 2;
		vector<int> to_remove;
		for (int i = 0; i < N; i++) {
			if (!binary_search(v.begin(), v.end(), i)) {
				if (!binary_search(alr_in.begin(), alr_in.end(), i)) {
					move_inside(i);
				}
				if (press_button() > mid) {
					move_outside(i);
				} else {
					to_remove.pb(i);
				}
			}
		}
		if ((int)to_remove.size() == (int)v.size() * (mid - 1)) {
			ans = mid;
			lo = mid + 1;
			alr_in = to_remove;
			sort(alr_in.begin(), alr_in.end());
		} else {
			hi = mid - 1;
			for (auto i : to_remove) {
				move_outside(i);
			}
		}		
	}
	return ans;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 15
• Subtask 3: 0 / 75