Submission #298879

#	Time	Username	Problem	Language	Result	Execution time	Memory
298879		lani1akea	Combo (IOI18_combo)	C++17	0 / 100	1 ms	200 KiB

combo

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

using namespace std;
string guess_sequence(int N) {
  string s = "";
  vector<char> v = {'A', 'B', 'X', 'Y'};
  int x = press("AB");
  if (x) {
    if (press("A")) {s += 'A'; v.erase(v.begin());}
    else {s += 'B'; v.erase(v.begin() + 1);}
  } else {
    if (press("X")) {s += 'X'; v.erase(v.begin() + 2);}
    else {s += 'Y'; v.erase(v.begin() + 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];
     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: 0 / 5
• Subtask 2: 0 / 95