Submission #944903

#	Time	Username	Problem	Language	Result	Execution time	Memory
944903		nguyentunglam	Counting Mushrooms (IOI20_mushrooms)	C++17	80.71 / 100	6 ms	984 KiB

mushrooms

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

int count_mushrooms(int n) {
  int j = 1;
  vector<int> a, b;
  a.push_back(0);
  int ans = 0;
  while (j < n) {
    vector<int> query;
    int total = 0;
    if (a.size() > b.size()) {
      for(int i = 0; i < a.size(); i++) {
        query.push_back(a[i]);
        if (i + 1 < a.size() && j < n) query.push_back(j++), total++;
      }
      if (j < n) query.push_back(j);
      int result = use_machine(query);
      if (j < n) {
        if (result % 2) b.push_back(j);
        else a.push_back(j);
        j++;
      }
      ans += total - result / 2;
    }
    else {
      for(int i = 0; i < b.size(); i++) {
        query.push_back(b[i]);
        if (i + 1 < b.size() && j < n) query.push_back(j++), total++;
      }
      if (j < n) query.push_back(j);
      int result = use_machine(query);
      if (j < n) {
        if (result % 2) a.push_back(j);
        else b.push_back(j);
        j++;
      }
      ans += result / 2;
    }
  }

  return ans + a.size();
}

Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:14:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |       for(int i = 0; i < a.size(); i++) {
      |                      ~~^~~~~~~~~~
mushrooms.cpp:16:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |         if (i + 1 < a.size() && j < n) query.push_back(j++), total++;
      |             ~~~~~~^~~~~~~~~~
mushrooms.cpp:28:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |       for(int i = 0; i < b.size(); i++) {
      |                      ~~^~~~~~~~~~
mushrooms.cpp:30:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |         if (i + 1 < b.size() && j < n) query.push_back(j++), total++;
      |             ~~~~~~^~~~~~~~~~

• Subtask 1: 80.7143 / 100