Submission #339598

#	Time	Username	Problem	Language	Result	Execution time	Memory
339598		ogibogi2004	Combo (IOI18_combo)	C++14	100 / 100	44 ms	516 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
string guess_sequence(int N) {
  /*string p = "";
  for (int i = 0; i < 4 * N; ++i) {
    p += 'A';
  }
  int coins = press(p);
  string S = "";
  for (int i = 0; i < N; ++i) {
    S += 'A';
  }
  return S;*/
  string p="";
  string s="";
  vector<char>v;
  p="AB";
  int xd=press(p);
  if(xd==0)
  {
	  xd=press("X");
	  if(xd==0)s+="Y";
	  else s+="X";
  }
  else
  {
	  xd=press("A");
	  if(xd==0)s+="B";
	  else s+="A";
  }
  if(s[0]!='A')v.push_back('A');
  if(s[0]!='X')v.push_back('X');
  if(s[0]!='Y')v.push_back('Y');
  if(s[0]!='B')v.push_back('B');
  if(N==1)
  {
	  return s;
  }
  for(int i=1;i+1<N;i++)
  {
	  p="";
	  p+=s;p+=v[0];
	  p+=s;p+=v[1];p+=v[0];
	  p+=s;p+=v[1];p+=v[1];
	  p+=s;p+=v[1];p+=v[2];
	  xd=press(p);
	  if(xd==s.size())
	  {
		  s+=v[2];
	  }
	  else if(xd==s.size()+1)
	  {
		  s+=v[0];
	  }
	  else
	  {
		  s+=v[1];
	  }
  }
  p=s;
  p+=v[0];
  xd=press(p);
  if(xd==N)return p;
  p=s;
  p+=v[1];
  xd=press(p);
  if(xd==N)return p;
  p=s;
  p+=v[2];
  return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:48:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |    if(xd==s.size())
      |       ~~^~~~~~~~~~
combo.cpp:52:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |    else if(xd==s.size()+1)
      |            ~~^~~~~~~~~~~~

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