Submission #1281126

#	Time	Username	Problem	Language	Result	Execution time	Memory
1281126		Faisal_Saqib	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
std::string guess_sequence(int n) {
  string s="";
  if(press("AB"))
  {
    if(press("A"))
    {
        s+='A';
    }
    else{
        s+='B';
    }
  }
  else
  {
    if(press("X"))
    {
        s+='X';
    }
    else{
        s+='Y';
    }
  }
//   cout<<"Cur "<<s<<endl;
  set<char> ap ={'A','B','X','Y'};
  ap.erase(s[0]);
  vector<char> pos(all(ap));
  for(int i=2;i<n;i++)
  {
    string qs=s+pos[0]+s+pos[1]+pos[0]+s+pos[1]+pos[1]+s+pos[1]+pos[2];
    int x=press(qs)-s.size();
    // cout<<"ASKEd "<<qs<<' '<<x<<endl;
    if(x==0)
    {
        s+=pos[2];
    }
    else if(x==1)
    {
        s+=pos[0];
    }
    else{
        s+=pos[1];
    }
  }
  if(press(s+pos[0])==s.size()+1)
  {
    s+=pos[0];
  }
  else if(press(s+pos[1])==s.size()+1)
  {
    s+=pos[1];
  }
  else{
    s+=pos[2];
  }
  return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:29:20: error: 'all' was not declared in this scope
   29 |   vector<char> pos(all(ap));
      |                    ^~~
combo.cpp:29:20: note: suggested alternatives:
In file included from /usr/include/c++/13/filesystem:48,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:200,
                 from combo.cpp:2:
/usr/include/c++/13/bits/fs_fwd.h:154:7: note:   'std::filesystem::perms::all'
  154 |       all               =  0777,
      |       ^~~
In file included from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:89:
/usr/include/c++/13/ranges:1308:27: note:   'std::ranges::views::all'
 1308 |     inline constexpr _All all;
      |                           ^~~