Submission #1180547

#	Time	Username	Problem	Language	Result	Execution time	Memory
1180547		mariaclara	Rarest Insects (IOI22_insects)	C++17	69.51 / 100	35 ms	432 KiB

insects

#include "insects.h"
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef pair<int,int> pii;
#define all(x) x.begin(), x.end()
#define sz(x) (int)x.size()
#define mk make_pair
#define pb push_back
#define fr first
#define sc second

int rand(int a, int b) {
    return rand()%(b-a+1) + a;
}

int min_cardinality(int N) {
    vector<int> in(N), block(N);
    int colors = 0, n = N;

    srand(654319);

    for(int i = 0; i < N; i++) {
        move_inside(i);
        in[i] = 1;
        if(press_button() == 2) move_outside(i), in[i] = 0; 
        else colors++;
    }

    if(colors == 1) return N;

    int l = 1, r = N/colors;
    while(l <= r) {
        int mid = rand(l, r - (r-l+1)/4), qtd = 0;
        if(r == 1) return 1;

        for(int i = 0; i < N; i++) {
            if(in[i]) { qtd++; continue; }
            if(block[i]) continue;
            in[i] = 1;
            move_inside(i);
            if(press_button() > mid) move_outside(i), in[i] = 0;
            else qtd++;
        }

        if(qtd == colors*mid) l = mid+1;
        else {
            r = mid-1;
            for(int i = 0; i < N; i++) {
                if(in[i]) move_outside(i), in[i] = 0;
                else n -= (block[i] == 0), block[i] = 1;
            }
            r = min(r, n/colors);
        }
    }
    
    return l-1;
}

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 44.51 / 75