Submission #830540

#	Time	Username	Problem	Language	Result	Execution time	Memory
830540		tolbi	Rarest Insects (IOI22_insects)	C++17	47.50 / 100	227 ms	604 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;
    f = [&](int x)->int{
        int ans = 0;
        vector<int> crr;
        for (int i = 0; i < n; i++){
            crr.push_back(i);
            move_inside(i);
            if (press_button()>x){
                ans++;
                crr.pop_back();
                move_outside(i);
            }
        }
        for (int i = 0; i < crr.size(); ++i)
        {
            move_outside(crr[i]);
        }
        return ans;
    };
    int diff = n-f(1);
    int l = 1, r = n;
    while (l<r){
        int mid = l+(r-l+1)/2;
        if (f(mid)>n-(mid*diff)){
            r=mid-1;
        }
        else l = mid;
    }
    return l;
}

Compilation message (stderr)

insects.cpp: In lambda function:
insects.cpp:19:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |         for (int i = 0; i < crr.size(); ++i)
      |                         ~~^~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 22.5 / 75