Submission #628266

#	Time	Username	Problem	Language	Result	Execution time	Memory
628266		galca	Rarest Insects (IOI22_insects)	C++17	0 / 100	1 ms	208 KiB

insects

#include "insects.h"
#include <vector>

using namespace std;

int min_cardinality(int N) {
	vector<int> vec1;
	vector<int> vec2;
	 
	int min_card = N;
	int dir = 1;

	for (int i = 0; i < N; i++) {
		vec1.push_back(i);
	}
	
	vector<int> distinct;
	for (int i = 0; i < vec1.size(); i++) {
		move_inside(vec1[i]);
		int res = press_button();
		if (res != 1) {
			move_outside(vec1[i]);
			vec2.push_back(vec1[i]);
		}
		else {
			distinct.push_back(vec1[i]);
		}
	}

	int num_sets = distinct.size();
	if (num_sets == N) {
		return 1;
	}

	for (int i = 0; i < distinct.size(); i++) {
		move_outside(distinct[i]);
	}

	distinct.erase(distinct.begin(), distinct.end());
	vec1.erase(vec1.begin(), vec1.end());

	int iter = 1;
	while ((vec1.size() + vec2.size()) > 0) {
		++iter;

		vector<int>& src = dir ? vec2 : vec1;
		vector<int>& dst = dir ? vec1 : vec2;

		vector<int> distinct;
		for (int i = 0; i < src.size(); i++) {
			move_inside(src[i]);
			int res = press_button();
			if (res != 1) {
				move_outside(src[i]);
				dst.push_back(src[i]);
			}
			else {
				distinct.push_back(src[i]);
			}
		}
		if (distinct.size() != num_sets) {
			return iter;
		}

		distinct.erase(distinct.begin(), distinct.end());
		src.erase(src.begin(), src.end());
		dir ^= 1;
	}

	return iter;
}

Compilation message (stderr)

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |  for (int i = 0; i < vec1.size(); i++) {
      |                  ~~^~~~~~~~~~~~~
insects.cpp:35:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |  for (int i = 0; i < distinct.size(); i++) {
      |                  ~~^~~~~~~~~~~~~~~~~
insects.cpp:50:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |   for (int i = 0; i < src.size(); i++) {
      |                   ~~^~~~~~~~~~~~
insects.cpp:61:23: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   61 |   if (distinct.size() != num_sets) {
      |       ~~~~~~~~~~~~~~~~^~~~~~~~~~~
insects.cpp:10:6: warning: unused variable 'min_card' [-Wunused-variable]
   10 |  int min_card = N;
      |      ^~~~~~~~

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