Submission #1232363

#	Time	Username	Problem	Language	Result	Execution time	Memory
1232363		clemmy14	Rarest Insects (IOI22_insects)	C++20	0 / 100	0 ms	408 KiB

insects

#include<bits/stdc++.h>
#include "insects.h"
using namespace std;

int n, t, sofarl;
bool up=false;
set<int> dontUse;
vector<int> machine;

bool check(int k) {
    if(up) {
        for(auto x : machine) dontUse.insert(x);
    } else {
        set<int> used;
        for(auto x : machine) used.insert(x);
        for(int i=0; i<n; i++) if(!used.count(i)) dontUse.insert(i);
        
        for(int i=sofarl*k; i<machine.size(); i++) {
            move_outside(i);
            machine.pop_back();
        }
    }
    for(int i=0; i<n; i++) if(!dontUse.count(i)) {
        machine.push_back(i);
        move_inside(i);
        if(press_button() > k) {
            machine.pop_back();
            move_outside(i);
        } 
    }
    return machine.size() == k*t;
}

int lastTrue(int lo, int hi) {
    lo--;
    while(lo < hi) {
        sofarl=lo;
        int mid = lo+(hi-lo+1)/2;
        //cout << lo << ' ' << mid << ' ' << hi << endl;
        if(check(mid)){
            lo=mid; 
            up=false;
        } else {
            hi=mid-1;
            up=true;
        }
    }
    return lo;
}

int min_cardinality(int N) {
    n=N;
    for(int i=0; i<N; i++) {
        machine.push_back(i);
        move_inside(i);
        if(press_button() == 1) continue;
        machine.pop_back();
        move_outside(i);
    }
    t=machine.size();
    return lastTrue(1, N/t)+1;
}

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