Submission #859047

#	Time	Username	Problem	Language	Result	Execution time	Memory
859047		thinknoexit	Rarest Insects (IOI22_insects)	C++17	10 / 100	191 ms	600 KiB

insects

#include <bits/stdc++.h>
#include "insects.h"
using namespace std;
using ll = long long;
int in[2020];
int min_cardinality(int n) {
    int type = 0;
    for (int i = 0;i < n;i++) {
        move_inside(i);
        if (press_button() == 2) {
            move_outside(i);
        }
        else in[i] = 1, type++;
    }
    if (type == 1) return n;
    int mxans = n / type;
    int sq = sqrt(n);
    int now = 1;
    // while (now + sq <= mxans) {
    //     now += sq;
    //     int cnt = 0;
    //     for (int i = 0;i < n;i++) {
    //         if (in[i]) continue;
    //         move_inside(i);
    //         if (press_button() > now) {
    //             move_outside(i);
    //         }
    //         else in[i] = now, cnt++;
    //     }
    //     if (cnt < type * sq) {
    //         for (int i = 0;i < n;i++) {
    //             if (in[i] == now) move_outside(i), in[i] = 0;
    //         }
    //         while (1) {
    //             now++;
    //             int cnt = 0;
    //             for (int i = 0;i < n;i++) {
    //                 if (in[i]) continue;
    //                 move_inside(i);
    //                 if (press_button() > now) {
    //                     move_outside(i);
    //                 }
    //                 else in[i] = now, cnt++;
    //             }
    //             if (cnt != type) return now - 1;
    //         }
    //     }
    // }
    while (now <= mxans) {
        now++;
        int cnt = 0;
        for (int i = 0;i < n;i++) {
            if (in[i]) continue;
            move_inside(i);
            if (press_button() > now) {
                move_outside(i);
            }
            else in[i] = now, cnt++;
        }
        if (cnt != type) return now - 1;
    }
    // n , n , n
    /*
        ans <= n / type
        ans <= n - mx
    */
    return -1;
}

Compilation message (stderr)

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:17:9: warning: unused variable 'sq' [-Wunused-variable]
   17 |     int sq = sqrt(n);
      |         ^~

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