Submission #786335

#	Time	Username	Problem	Language	Result	Execution time	Memory
786335		vjudge1	Rarest Insects (IOI22_insects)	C++17	53.13 / 100	173 ms	444 KiB

insects

#include "insects.h"
#include <bits/stdc++.h>
using namespace std;
int min_cardinality(int N) {
    int cnt = 0;
    vector<bool> f(N);
    for (int i = 0; i < N; i++) {
        move_inside(i);
        if (press_button() <= 1) {
            f[i] = 1;
            cnt++;
        } else {
            move_outside(i);
        }
    }
    int lo = 1, hi = N / cnt, in = cnt;
    while (lo < hi) {
        int mi = (lo + hi + 1) / 2;
        for (int i = 0; i < N; i++) {
            if (f[i]) {
                continue;
            }
            move_inside(i);
            if (press_button() <= mi) {
                in++;
                f[i] = 1;
            } else {
                move_outside(i);
            }
        }
        if (in == mi * cnt) {
            lo = mi;
        } else {
            for (int i = 0; i < N; i++) {
                if (f[i]) {
                    f[i] = 0;
                    in--;
                    move_outside(i);
                }
            }
            hi = mi - 1;
        }
    }
    return lo;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 28.13 / 75