Submission #634184

#	Time	Username	Problem	Language	Result	Execution time	Memory
634184		flappybird	Rarest Insects (IOI22_insects)	C++17	0 / 100	1 ms	208 KiB

insects

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

#define MAX 2020

int chk[MAX];
int num[MAX];

int min_cardinality(int N) {
	int K;
	K = 0;
	int i;
	int on = 0;
	for (i = 0; i < N; i++) {
		move_inside(i);
		if (press_button() > 1) move_outside(i);
		else num[i] = 1, chk[i] = 1, on++;
	}
	int l, r;
	K = on;
	l = 0, r = N / K;
	while (r - l > 1) {
		int mid = (l + r + 1) / 2;
		vector<int> nb;
		for (i = 0; i < N; i++) {
			if (!chk[i] && !num[i]) {
				move_inside(i);
				if (press_button() > mid) {
					nb.push_back(i);
					move_outside(i);
				}
				on++;
			}
			if (on == mid * K) break;
		}
		if (on == mid * K) {
			for (i = 0; i < N; i++) if (chk[i]) num[i] = 1;
			l = mid;
		}
		else {
			for (auto v : nb) num[v] = -1;
			for (i = 0; i < N; i++) if (chk[i] && !num[i]) chk[i] = 0, move_outside(i), on--;
		}
	}
	return r;
}

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