Submission #210469

#	Time	Username	Problem	Language	Result	Execution time	Memory
210469		bash	Combo (IOI18_combo)	C++17	100 / 100	41 ms	692 KiB

combo

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

using namespace std;

string guess_sequence(int N)
{
  string s;
  string a="A", b="B", c="X";
  if(press("AB")) {
    if(press("A")) {
      s="A";
      a="Y";
    }
    else {
      b="Y";
      s="B";
    }
  }
  else {
    if(press("X")) {
      c="Y";
      s="X";
    }
    else s="Y";
  }
  for(int i=2;i<N;i++) {
    int k=press(s+a+s+b+a+s+b+b+s+b+c);
    if(k==i) s+=a;
    else if(k==i+1) s+=b;
    else s+=c;
  }
  if(N>1) {
    if(press(s+a)==s.size()+1) return s+a;
    if(press(s+b)==s.size()+1) return s+b;
    return s+c;
  }
  return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:34:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     if(press(s+a)==s.size()+1) return s+a;
      |        ~~~~~~~~~~^~~~~~~~~~~~
combo.cpp:35:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |     if(press(s+b)==s.size()+1) return s+b;
      |        ~~~~~~~~~~^~~~~~~~~~~~

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