제출 #1070847

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1070847		JoenPoenMan	드문 곤충 (IOI22_insects)	C++17	0 / 100	267 ms	600 KiB

insects

#include "insects.h"

#include <bits/stdc++.h>

using namespace std;

int min_cardinality(int n) {
  int k = 0;
  vector<int> S;
  for (int i = 0; i< n; i++) {
      move_inside(i);
      if (press_button() == 2) {
          move_outside(i);
      } else S.push_back(i);
  }
  k = S.size();
  
  
  int _n = n, y = 0;
  vector<bool> active(n, 1);
  while (_n > 4) { 
      int x = (_n+2*k-1)/(2*k);
      for (int i : S) move_outside(i);
      S.clear();
      for (int i = 0; i< n; i++) if (active[i]) {
          move_inside(i);
          if (press_button() == x+1) {
              move_outside(i);
          } else S.push_back(i);
      }
      
      if (S.size() < x*k) {
          active.assign(n, 0);
          _n = 0;
          for (int i : S) active[i] = 1, _n++;
      } else {
          for (int i : S) {
              _n -= active[i];
              active[i] = 0;
          }
          y += x;
      }
      
  }
  
  int l = 0, h = _n;
  while (l < h) {
      int x = (l+h+1)/2;
      for (int i : S) move_outside(i);
      S.clear();
      for (int i = 0; i< n; i++) if (active[i]) {
          move_inside(i);
          if (press_button() == x+1) {
              move_outside(i);
          } else S.push_back(i);
      }
      
      if (S.size() < x*k) {
          h = x-1;
      } else {
          l = x;
      }
  }
  return y+l;
}

컴파일 시 표준 에러 (stderr) 메시지

insects.cpp: In function 'int min_cardinality(int)':
insects.cpp:32:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   32 |       if (S.size() < x*k) {
      |           ~~~~~~~~~^~~~~
insects.cpp:58:20: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   58 |       if (S.size() < x*k) {
      |           ~~~~~~~~~^~~~~

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