Submission #305854

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
305854	2020-09-24 03:06:12	myungwoo	Counting Mushrooms (IOI20_mushrooms)	C++17	80.43 / 100	11 ms	512 KiB

mushrooms

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#include <bits/stdc++.h>
#include "mushrooms.h"
using namespace std;
#define debug(...) fprintf(stderr, __VA_ARGS__), fflush(stderr)
int count_mushrooms(int N)
{
  const int K = 137;
  int add = 0;
  vector <int> arr[2];
  arr[0] = {0};
  for (int i=1;i<N;i++){
    if (arr[0].size() >= K){
      vector <int> test;
      for (int j=0;j<K&&i+j<N;j++){
        test.push_back(arr[0][j]);
        test.push_back(i+j);
      }
      int res = use_machine(test);
      add += test.size()>>1;
      add -= res&1;
      add -= res>>1;
      i += K-1;
    }
    else if (arr[1].size() >= K){
      vector <int> test;
      for (int j=0;j<K&&i+j<N;j++){
        test.push_back(arr[1][j]);
        test.push_back(i+j);
 
 
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Compilation message (stderr)

mushrooms.cpp: In function 'int count_mushrooms(int)':
mushrooms.cpp:43:14: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   43 |    arr[res>>1&1^1].push_back(i);
      |        ~~~~~~^~
mushrooms.cpp:44:11: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   44 |    arr[res&1^1].push_back(++i);
      |        ~~~^~

• Subtask 1: 80.427 / 100