Submission #245717

#	Time	Username	Problem	Language	Result	Execution time	Memory
245717		uacoder123	Combo (IOI18_combo)	C++14	100 / 100	40 ms	708 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
string guess_sequence(int N)
{
  int n=N;
  string s="";
  vector<string> v={"A","B","X","Y"};
  if(n>=2)
  {
  if(press("AB")>=1)
  {
    if(press("A"))
    {
      s+="A";
      string s1="A";
      v.erase(v.begin()+0);
    }
    else
    {
      v.erase(v.begin()+1);
      s+="B";
    }
  }
  else
  {
    if(press("X"))
    {
      v.erase(v.begin()+2);
      s+="X";
    }
    else
    {
      v.erase(v.begin()+3);
      s+="Y";
    }
  }
  v.push_back(s);
  for(int i=0;i<n-2;++i)
  {
    int x=press(s+v[0]+s+v[1]+v[0]+s+v[1]+v[1]+s+v[1]+v[2]);
    if(x==s.size()+1)
      s+=v[0];
    else if(x==s.size()+2)
      s+=v[1];
    else
      s+=v[2];
  }
  }
  if(press(s+"A"+s+"B")==s.size()+1)
  {
    if(press(s+"A")==s.size()+1)
      s+="A";
    else
      s+="B";
  }
  else
  {
    if(press(s+"X")==s.size()+1)
      s+="X";
    else
      s+="Y";
  }
  return(s);
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:42:9: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     if(x==s.size()+1)
      |        ~^~~~~~~~~~~~
combo.cpp:44:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     else if(x==s.size()+2)
      |             ~^~~~~~~~~~~~
combo.cpp:50:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |   if(press(s+"A"+s+"B")==s.size()+1)
      |      ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~
combo.cpp:52:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |     if(press(s+"A")==s.size()+1)
      |        ~~~~~~~~~~~~^~~~~~~~~~~~
combo.cpp:59:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   59 |     if(press(s+"X")==s.size()+1)
      |        ~~~~~~~~~~~~^~~~~~~~~~~~

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