Submission #1233183

#	Time	Username	Problem	Language	Result	Execution time	Memory
1233183		nicolo_010	Rarest Insects (IOI22_insects)	C++20	47.50 / 100	61 ms	532 KiB

insects

#include <bits/stdc++.h>
#include "insects.h"
using namespace std;
template <typename T>
using v = vector<T>;
using pii = pair<int, int>;
using ll = long long;
#define rep(i, k, n) for (int i = k; i < n; i++)

int min_cardinality(int N) {
	map<int, int> mp;
	int in = 0;
	int d;
	v<int> gr;
	rep(b, 1, 2) {
		rep(i, 0, N) {
			if (mp.count(i)) continue;
			move_inside(i);
			in++;
			int a = press_button();
			if (a > b) {
				move_outside(i);
				in--;
			}
			else {
				mp[i] = 1;
			}
			if (a == b && b == 1) {
				gr.push_back(i);
			}
		}
		if (b == 1) d = in;
		for (auto x : gr) {
			move_outside(x);
		}
	}
	int l = 0, r = N;
	int ans = N;
	while (l <= r) {
		int m = (l+r)/2;
		in = 0;
		v<int> getout;
		rep(i, 0, N) {
			move_inside(i);
			int a = press_button();
			if (a > m)  {
				move_outside(i);
			}
			else {
				getout.push_back(i);
				in++;
			}
		} 
		for (auto x : getout) {
			move_outside(x);
		}
		if (in == m*d) {
			ans = m;
			l = m+1;
		}
		else r =m-1;
	}
	return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 22.5 / 75