Submission #304028

#	Time	Username	Problem	Language	Result	Execution time	Memory
304028		Fdg	Counting Mushrooms (IOI20_mushrooms)	C++14	10 / 100	243 ms	804 KiB

mushrooms

#include <iostream>
#include <vector>
#include <map>
#include <set>
#include <algorithm>
#include "mushrooms.h"

using namespace std;

const int VAL = 141;

vector<int> a, b;

int count_mushrooms(int n) {
  a.clear(); b.clear();

  srand(time(NULL));
  vector<int> v;
  for (int i = 1; i < n; ++i)
    v.push_back(i);
  // random_shuffle(v.begin(), v.end());

  int ans = 0, pos = 0;

  a.push_back(0);
  while (pos < (int) v.size()/*a.size() < VAL || b.size() < VAL*/) {
    // if (a.size() > 1) {
    //   vector<int> arr = {a[0]};
    //   if (pos < (int) v.size()) arr.push_back(v[pos]), ++pos;
    //   arr.push_back(a[1]); 
    //   if (pos < (int) v.size()) arr.push_back(v[pos]), ++pos;

    //   int ret = use_machine(arr);
    //   if (ret & 2) {
    //     b.push_back(arr[1]);
    //   } else {
    //     a.push_back(arr[1]);
    //   }
    //   if (ret & 1) {
    //     b.push_back(arr[3]);
    //   } else {
    //     a.push_back(arr[3]);
    //   }
    // } else if (b.size() > 1) {
    //   vector<int> arr = {b[0]};
    //   if (pos < (int) v.size()) arr.push_back(v[pos]), ++pos;
    //   arr.push_back(b[1]); 
    //   if (pos < (int) v.size()) arr.push_back(v[pos]), ++pos;

    //   int ret = use_machine(arr);
    //   if (ret & 2) {
    //     a.push_back(arr[1]);
    //   } else {
    //     b.push_back(arr[1]);
    //   }
    //   if (ret & 1) {
    //     a.push_back(arr[3]);
    //   } else {
    //     b.push_back(arr[3]);
    //   }
    //} else
    {
      vector<int> arr = {a[0]};
      if (pos < (int) v.size()) arr.push_back(v[pos]), ++pos;

      int ret = use_machine(arr);
      if (ret & 1) {
        b.push_back(arr[1]);
      } else {
        a.push_back(arr[1]);
      }
    }
  }

  ans = a.size();

  return ans;
}

• Subtask 1: 10 / 100