Submission #298884

#	Time	Username	Problem	Language	Result	Execution time	Memory
298884		lani1akea	Combo (IOI18_combo)	C++17	5 / 100	1 ms	200 KiB

combo

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

using namespace std;
string guess_sequence(int N) {
  string s = "";
  char v[] = {'A', 'B', 'X', 'Y'}; int x;
  if (press("AB")) {
    x = press("A") != 1;
  } else {
    x = (press("X") ? 2 : 3);
  }
  s += v[x];
  swap(v[x], v[3]);
  for (int i = 1; i < N - 1; ++i) {
     x = press(s + v[0] + v[0] + s + v[0] + v[1] + s + v[0] + v[2] + s + v[1]);
     if (x == i + 2) s += v[0];
     else if (x == i + 1) s += v[1];
     else s += v[2];
  }
  if (press(s + v[0] + s + v[1]) == N) {
    if (press(s + v[0]) == N) s += v[0];
    else s += v[1];
  } else s += v[2];
  return s;
}

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