Submission #830907

#	Time	Username	Problem	Language	Result	Execution time	Memory
830907		tolbi	Rarest Insects (IOI22_insects)	C++17	0 / 100	14 ms	312 KiB

insects

#include <bits/stdc++.h>
using namespace std;
mt19937 ayahya(chrono::high_resolution_clock().now().time_since_epoch().count());
#include "insects.h"
int min_cardinality(int n) {
    function<int(int)> f;
    set<int> olan;
    for (int i = 0; i < n; ++i)
    {
        olan.insert(i);
    }
    vector<int> kullandim;
    vector<int> kullanmadim;
    f = [&](int x)->int{
        int ans = 0;
        vector<int> crr;
        for (auto it : olan){
            crr.push_back(it);
            move_inside(it);
            if (press_button()>x){
                crr.pop_back();
                kullanmadim.push_back(it);
                move_outside(it);
            }
            else kullandim.push_back(it),ans++;
        }
        for (int i = 0; i < crr.size(); ++i)
        {
            move_outside(crr[i]);
        }
        return ans;
    };
    int diff = f(1);
    kullanmadim.clear();
    kullandim.clear();
    if (diff==1) return n;
    int l = 1, r = n;
    int hueh = 0;
    while (l<r){
        int mid = l+(r-l+1)/2;
        int hayda = f(mid);
        //cout<<l<<" "<<r<<" "<<mid<<" "<<hayda<<" "<<hueh<<endl;
        if (hayda+hueh<(mid*diff)){
            r=mid-1;
            for (auto &it : kullanmadim){
                olan.erase(it);
            }
        }
        else {
            l = mid;
            hueh+=hayda;
            for (auto &it : kullandim){
                olan.erase(it);
            }
        }
        kullandim.clear();
        kullanmadim.clear();
    }
    return l;
}

Compilation message (stderr)

insects.cpp: In lambda function:
insects.cpp:27:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |         for (int i = 0; i < crr.size(); ++i)
      |                         ~~^~~~~~~~~~~~

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