Submission #1279283

#	Time	Username	Problem	Language	Result	Execution time	Memory
1279283		tull	Combo (IOI18_combo)	C++20	10 / 100	16 ms	444 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
std::string guess_sequence(int N) {
  int p=0,r;
  char c[]={'A','B','X','Y'};
  char sk;
  string a="";
  for(auto&e:c){
    r=press(a+e);
      if(r>p){
        ++p;
        a+=e;
        sk=e;
        break;
    }
  }
  while (p<N)
  {
    for(int i=0;i<4;++i){
      char e=c[i];
      if(e==sk)continue;
      if(i!=3)r=press(a+e);
      else r=p+1;
      if(r>p){
        ++p;
        a+=e;
        break;
      }
    }
  }
  
  return a;
}

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