Submission #830509

#	Time	Username	Problem	Language	Result	Execution time	Memory
830509		tolbi	Rarest Insects (IOI22_insects)	C++17	10 / 100	218 ms	328 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) {
    vector<int> par(n);
    function<int(int)> find = [&](int node)->int{
        if (par[node]==node) return node;
        return par[node]=find(par[node]);
    };
    vector<int> hueh(n);
    iota(hueh.begin(), hueh.end(), 0);
    for (int i = n-1; i >= 0; i--){
        swap(hueh[i],hueh[ayahya()%(i+1)]);
    }
    vector<int> sz(n,1);
    iota(par.begin(), par.end(), 0);
    vector<int> crr;
    function<int()> findx;
    findx = [&]()->int{
        for (int i = 0; i < crr.size(); i++){
            move_outside(crr[i]);
            if (press_button()==1){
                for (int j=0;j<=i;j++){
                    move_inside(crr[j]);
                }
                return i;
            }
        }
        return 23;
    };
    for (int kk = 0; kk < n; kk++){
        int i = hueh[kk];
        move_inside(i);
        if (press_button()>1){
            int pos = crr[findx()];
            sz[find(pos)]+=sz[find(i)];
            sz[find(i)]=0;
            par[i]=find(pos);
            move_outside(i);
        }
        else crr.push_back(i);
    }
    int ans = n;
    for (int i = 0; i < n; i++){
        if (find(i)!=i) continue;
        ans=min(ans,sz[i]);
    }
    return ans;
}

Compilation message (stderr)

insects.cpp: In lambda function:
insects.cpp:21:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |         for (int i = 0; i < crr.size(); i++){
      |                         ~~^~~~~~~~~~~~

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