Submission #726765

#	Time	Username	Problem	Language	Result	Execution time	Memory
726765		murad_2005	Rarest Insects (IOI22_insects)	C++17	0 / 100	196 ms	352 KiB

insects

#include "insects.h"
#include <bits/stdc++.h>
#define ll long long
#define ull unsigned ll
#define pii pair<int, int>
#define piii pair<int, pii>
#define pb push_back
#define all(v) v.begin(), v.end()
#define size(v) v.size()
#define f first
#define s second
#define INF 1e9

using namespace std;

bool check(int x, int Types, int N, set<int>&pos){
    for(int i = 0; i < N; ++i){
        move_inside(i);
        if(press_button() > x){
            move_outside(i);
        }else{
            pos.insert(i);
        }
    }
    int Size = size(pos);

    if(Size == x * Types){
        return true;
    }
    return false;
}

int min_cardinality(int N) {
    set<int>pos;
    for(int i = 0; i < N; ++i){
        move_inside(i);
        if(press_button() > 1){
            move_outside(i);
        }else{
            pos.insert(i);
        }
    }
    int Types = size(pos);
    int low = 2, high = N / Types, best = 1;
    while(low <= high){ // is it possible to encounter at least mid element for every type?
        int mid = (low + high) >> 1;
        if(check(mid, Types, N, pos)){
            low = mid + 1;
            best = mid;
        }else{
            high = mid - 1;
        }
    }
    return best;
}

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