Submission #237409

#	Time	Username	Problem	Language	Result	Execution time	Memory
237409		dannber_BR	Combo (IOI18_combo)	C++14	0 / 100	3088 ms	200 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>

using namespace std;

string Btns[] = {"A","B","X","Y"};

string guess_sequence(int N) {
  string s = "";
  int p = 0;
  int long_gues = 0;

  if (press(Btns[0]) == 1) {
    s += Btns[0];
    p = 0;
    long_gues++;
  }
  else if (press(Btns[1]) == 1) {
    s += Btns[1];
    p = 1;
    long_gues++;
  }
  else if (press(Btns[2]) == 1){
    s += Btns[2];
    p = 2;
    long_gues++;
  }
  else if (press(Btns[3]) == 1) {
    s += Btns[3];
    p = 3;
    long_gues++;
  }

  if (N == 1)
  {
    return s;
  }

  int last_one = 0;
  for(int i = long_gues + 1;i <= N;)
  {
    bool fact = false;
    if (press(s + Btns[last_one]) == i)
    {
          s += Btns[last_one];
          fact = true;
          long_gues++;
          i++;
    }
    else if (fact == false)
    {
      int k = 0;
      for(int j = 0;j <= 3;j++)
      {
        while(true)
        {
          if(k == p) k++;
          if(k > 3) k = 0;
          if(j != p && !fact && k != p) 
          {
            if(press(s + Btns[j] + Btns[k]) == i+1)
            {
              s += Btns[j] + Btns[k];
              i += 2;
              fact = true;
              last_one = k;
              break;
            }
            k++;
          }
        }
      }
    }
  }
  return s;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 95