Submission #1185294

#	Time	Username	Problem	Language	Result	Execution time	Memory
1185294		thelegendary08	Rarest Insects (IOI22_insects)	C++17	100 / 100	14 ms	436 KiB

insects

#include "insects.h"
#include<bits/stdc++.h>
#define f0r(i,n) for(int i = 0; i<n; i++)
#define vi vector<int>
#define vb vector<bool>
#define pb push_back
using namespace std;
int min_cardinality(int N) {
	vi perm;
	f0r(i, N)perm.pb(i);
	random_shuffle(perm.begin(), perm.end());
	vb in(N);
	vb notin(N);
	int cnt = 0;
	f0r(i, N){
		move_inside(perm[i]);
		cnt++;
		in[i] = 1;
		int x = press_button();
		if(x > 1){
			move_outside(perm[i]);
			cnt--;
			in[i] = 0;
		}
	}
	int d = 0;
	f0r(i, N){
		if(in[i])d++;
	}
	if(d == 1)return N;
	int lo = 1;
	int hi = N/d;
	while(lo < hi){
		int mid = lo + (hi - lo + 1) / 2;
		vi lst;
		vi lst2;
		f0r(i, N){
			if(!in[i] && !notin[i]){
				move_inside(perm[i]);
				cnt++;
				in[i] = 1;
				
				int x = press_button();
				if(x > mid){
					move_outside(perm[i]);
					cnt--;
					in[i] = 0;
				}
				else{
					lst.pb(perm[i]);
					lst2.pb(i);
				}
			}
			if(cnt == d * mid){
				break;
			}
			
		}
		int cnt2 = 0;
		f0r(i, N){
			if(in[i])cnt2++;
		}
		if(cnt2 == d * mid){
			lo = mid;
		}
		else{
			hi = mid - 1;
			f0r(i, N){
				if(!in[i]){
					notin[i] = 1;
				}
			}
			f0r(i, lst.size()){
				move_outside(lst[i]);
				cnt--;
				in[lst2[i]]= 0;
			}
		}
	}
	return lo;
}

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