Submission #835503

#	Time	Username	Problem	Language	Result	Execution time	Memory
835503		KemalK	Combo (IOI18_combo)	C++17	100 / 100	27 ms	608 KiB

combo

#include <bits/stdc++.h>
#include "combo.h"
using namespace std;

string guess_sequence(int n) {
  string s = "";
  string cur = "ABXY";
  if (press(s + "AB")){
    if (press(s + "A")){
      s += "A";
    }
    else{
      s += "B";
    }
  }
  else{
    if (press(s + "X")){
      s += "X";
    }
    else{
      s += "Y";
    }
  }
  if (n == 1){
    return s;
  }
  string rem = "";
  for (int i = 0; i < 4; i++){
    if (s[0] != cur[i]){
      rem += cur[i];
    }
  }
  int cnt = 1;
  for (int i = 1; i < n - 1; i++){
    string p = s + rem[0];
    for (int j = 0; j < 3; j++){
        p += s + rem[1] + rem[j];
    }
    int point = press(p);
    if (point == cnt + 1){
      s += rem[0];
    }
    else if (point == cnt + 2){
      s += rem[1];
    }
    else{
      s += rem[2];
    }
    cnt++;
  }
  if (press(s + rem[0]) == cnt + 1){
    s += rem[0];
  }
  else if (press(s + rem[1]) == cnt + 1){
    s += rem[1];
  }
  else{
    s += rem[2];
  }
  // cout << s << "\n";
  return s;
}

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