Submission #648844

#	Time	Username	Problem	Language	Result	Execution time	Memory
648844		Litusiano	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include<combo.h>
#include<bits/stdc++.h>
using namespace std;


string guess_sequence(int N){
  string ans;
  for(int i = 1; i<=N; ++i){
    string ans1 = ans.copy(); string ans2 = ans.copy();
    ans1+='A'; ans2+='B';
    //if(i == 3) cout<<ans1<<" "<<ans2<<endl;
    if(press(ans1+ans2) == i){
      if(press(ans1) == i) ans+='A';
      else ans+='B';
    }
    else{
      ans1[i-1] ='X';
      if(press(ans1) == i) ans+='X';
      else ans+='Y';
    }
  }
  return ans;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:9:28: error: no matching function for call to 'std::__cxx11::basic_string<char>::copy()'
    9 |     string ans1 = ans.copy(); string ans2 = ans.copy();
      |                            ^
In file included from /usr/include/c++/10/string:55,
                 from combo.h:3,
                 from combo.cpp:1:
/usr/include/c++/10/bits/basic_string.h:2279:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::copy(_CharT*, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]'
 2279 |       copy(_CharT* __s, size_type __n, size_type __pos = 0) const;
      |       ^~~~
/usr/include/c++/10/bits/basic_string.h:2279:7: note:   candidate expects 3 arguments, 0 provided
combo.cpp:9:54: error: no matching function for call to 'std::__cxx11::basic_string<char>::copy()'
    9 |     string ans1 = ans.copy(); string ans2 = ans.copy();
      |                                                      ^
In file included from /usr/include/c++/10/string:55,
                 from combo.h:3,
                 from combo.cpp:1:
/usr/include/c++/10/bits/basic_string.h:2279:7: note: candidate: 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::copy(_CharT*, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type, std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type) const [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::size_type = long unsigned int]'
 2279 |       copy(_CharT* __s, size_type __n, size_type __pos = 0) const;
      |       ^~~~
/usr/include/c++/10/bits/basic_string.h:2279:7: note:   candidate expects 3 arguments, 0 provided