Submission #1132237

#	Time	Username	Problem	Language	Result	Execution time	Memory
1132237		finalventure	Combo (IOI18_combo)	C++17	10 / 100	14 ms	456 KiB

combo

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

using namespace std;

string guess_sequence(int N) {
  string ret;
  vector<char> valid;
  if (press("AB"))
  {
    if (press("A"))
    {
      ret += 'A';
      valid = {'B', 'X', 'Y'};
    }
    else
    {
      ret += 'B';
      valid = {'A', 'X', 'Y'};
    }
  }
  else
  {
    if (press("X"))
    {
      ret += 'X';
      valid = {'A', 'B', 'Y'};
    }
    else
    {
      ret += 'Y';
      valid = {'A', 'B', 'X'};
    }
  }
  // int curr = 2;
  for (int i = 1; i < N; ++i)
  {
    ret += '.';
    for (char c : valid)
    {
      ret[i] = c;
      if (press(ret) == i + 1) break;
    } 
  }
  return ret;
}

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