Submission #658619

#	Time	Username	Problem	Language	Result	Execution time	Memory
658619		pere_gil	Rarest Insects (IOI22_insects)	C++17	0 / 100	3056 ms	300 KiB

insects

#include "insects.h"
#include "bits/stdc++.h"
using namespace std;
         
int min_cardinality(int n) {
	queue<int> in,out;
	for(int i=0;i<n;i++){
		move_inside(i);
		if(press_button()>1){
			move_outside(i);
			out.push(i);
		}
		else in.push(i);
	}
	int dif=(int)in.size();

	if(dif==1) return n;
	
	int l=1,r=n/dif+1;
	while(l<r){
		int med=(l+r)/2;
		queue<int> new_in,new_out;
		
		while(!out.empty()){
			int u=out.front(); out.pop();
			move_inside(u);
			int q=press_button();

			if(q>med){
				move_outside(u);
				new_out.push(u);
			}
			else new_in.push(u);

			if(in.size()+new_in.size()==dif*med) break;
		}

		if(in.size()+new_in.size()==dif*med){
			while(!new_in.empty()){
				in.push(new_in.front()); new_in.pop();
			}
			while(!new_out.empty()){
				out.push(new_out.front()); new_out.pop();
			}
			l=med;
		}
		else{
			while(!new_in.empty()){
				int u=new_in.front(); new_in.pop();
				move_outside(u);
				out.push(u);
			}
			r=med-1;
		}
		
	}
	
	return l;
}

Compilation message (stderr)

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:35:30: warning: comparison of integer expressions of different signedness: 'std::queue<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   35 |    if(in.size()+new_in.size()==dif*med) break;
      |       ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
insects.cpp:38:29: warning: comparison of integer expressions of different signedness: 'std::queue<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   38 |   if(in.size()+new_in.size()==dif*med){
      |      ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~

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