Submission #859258

#	Time	Username	Problem	Language	Result	Execution time	Memory
859258		thinknoexit	드문 곤충 (IOI22_insects)	C++17	0 / 100	4 ms	344 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++;
    }
    // for (int i = 0;i < n;i++) {
    //     if (!in[i]) move_inside(i), in[i] = 2;
    // }
    // int mxtype = press_button();
    // for (int i = 0;i < n;i++) if (in[i] == 2) move_outside(i), in[i] = 0;
    if (type == 1) return n;
    int mxans = n / type;
    int sq = sqrt(n);
    if (type >= sq) {
        int l = 1, r = mxans;
        while (l < r) {
            int mid = (l + r + 1) / 2;
            int sz = mid - l;
            int cnt = 0;
            for (int i = 0;i < n;i++) {
                if (in[i]) continue;
                move_inside(i);
                if (press_button() > mid) {
                    move_outside(i);
                }
                else in[i] = mid, cnt++;
            }
            if (cnt < type * sz) {
                r = mid - 1;
                for (int i = 0;i < n;i++) if (in[i] == mid) move_outside(i), in[i] = 0;
            }
            else l = mid;
        }
        return l;
    }
    else {
        for (int i = 0;i < n;i++) if (!in[i]) move_inside(i);
        for (int i = 0;i < n;i++) in[i] = 0;
        int l = 1, r = press_button();
        int idx = 1;
        while (l < r) {
            int mid = (l + r) / 2;
            int sz = r - mid;
            int cnt = 0;
            idx++;
            for (int i = 0;i < n;i++) {
                if (in[i]) continue;
                move_outside(i);
                if (press_button() < mid) {
                    move_inside(i);
                }
                else cnt++, in[i] = idx;
                if (cnt == type * sz) break;
            }
            if (cnt == type * sz) {
                l = mid + 1;
                for (int i = 0;i < n;i++) if (in[i] == idx) move_inside(i), in[i] = 0;
            }
            else r = mid;
        }
        return l - 1;
    }

    // n , n , n
    /*
        ans <= n / type
        ans <= n - mx
    */
}

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