Submission #574826

#	Time	Username	Problem	Language	Result	Execution time	Memory
574826		Hackapie	Combo (IOI18_combo)	C++17	10 / 100	80 ms	472 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
 
std::string guess_sequence(int N){
  set<char> s;
  s.insert('A');
  s.insert('B');
  s.insert('X');
  s.insert('Y');
  string res;
  for(int i=1;i<=N;i++){
    //each i for ith character
    //in first i we have 4 choices 
    //afterthat we have 3 choices always
    char c;
    for(auto x:s){
      string aux=res;
      aux+=x;
      int ans=press(aux);
      if(ans==i){
        //ok this is part of the string 
        res=aux;
        c=x;
        break;
      }
    }
    if(i==1)s.erase(c);
  }
  return res;
}

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