Submission #1079887

#	Time	Username	Problem	Language	Result	Execution time	Memory
1079887		Gromp15	Rarest Insects (IOI22_insects)	C++17	99.89 / 100	47 ms	848 KiB

insects

#include <bits/stdc++.h>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#include "insects.h"
using namespace std;
template<typename T> bool ckmin(T &a, const T &b) { return a > b ? a = b, 1 : 0; }
template<typename T> bool ckmax(T &a, const T &b) { return a < b ? a = b, 1 : 0; }

int min_cardinality(int N) {
	vector<int> groups{0};
	move_inside(0);
	for (int i = 1; i < N; i++) {
		move_inside(i);
		if (press_button() > 1) move_outside(i);
		else groups.push_back(i);
	}
	vector<int> pot(N);
	iota(all(pot), 0);
	int l = 2, r = sz(pot) / sz(groups), ans = 1;
	vector<int> got{groups};
	while (l <= r) {
		int mid = (l+r)/2;
		auto orig = got;
		for (int x : pot) {
			if (find(all(got), x) != got.end()) { 
				continue;
			}
			move_inside(x);
			if (press_button() > mid) move_outside(x);
			else got.push_back(x);
		}
		if (sz(got) == mid * sz(groups)) { 
			ans = mid, l = mid+1;
		}
		else { 
			r = mid-1;
			pot = got;
			for (int x : got) if (find(all(orig), x) == orig.end()) move_outside(x);
			got = orig;
		}
	}
	return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 74.89 / 75