Submission #708688

#	Time	Username	Problem	Language	Result	Execution time	Memory
708688		t6twotwo	Rarest Insects (IOI22_insects)	C++17	50 / 100	193 ms	408 KiB

insects

#include "insects.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int min_cardinality(int n) {
    vector<bool> in(n);
    for (int i = 0; i < n; i++) {
        move_inside(i);
        if (press_button() == 2) move_outside(i);
        else in[i] = 1;
    }
    int type = 0;
    for (int i = 0; i < n; i++) {
        if (in[i]) {
            type++;
            in[i] = 0;
            move_outside(i);
        }
    }
    int ans = 0;
    for (int i = 10; i >= 0; i--) {
        if ((ans + (1 << i)) * type > n) continue;
        ans += 1 << i;
        for (int j = 0; j < n; j++) {
            move_inside(j);
            if (press_button() == ans + 1) move_outside(j);
            else in[j] = 1;
        }
        int cnt = 0;
        for (int j = 0; j < n; j++) {
            if (in[j]) {
                cnt++;
                in[j] = 0;
                move_outside(j);
            }
        }
        if (cnt != ans * type) ans -= 1 << i;
    }
    return ans;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 25 / 75