Submission #1191876

#	Time	Username	Problem	Language	Result	Execution time	Memory
1191876		p4r4d0_x	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define ll long long

string guess_sequence(int N) {
  vector<char> a = {'A', 'B', 'X', 'Y'};
  string s = "";
  for(int i = 0; i < 4; ++i){
      s += a[i];
      if(press(s) == 1){
          break;
      }
      else s = "";
  }
  vector<char> b;
  for(int i = 0; i < 4; ++i){
      if(a[i] != s[0]){
          b.pb(a[i]);
      }
  }
  vector<string> vs;
  sort(begin(b), end(b));
  do{
      string st = "";
      for(int i = 0; i < 3; ++i){
          st += b[i];
      }
      vs.pb(b);
  }
  while(next_permutation(begin(b), end(b)));
  ll cnt = 1;
  while(cnt != N){
      if(cnt + 3 <= N){
          for(auto &x : vs){
              if(press(s + x) == cnt + 3){
                  s += x;
                  cnt += 3;
                  break;
              }
          }
      }
      else{
          for(int i = 0; i < 3; ++i){
              if(press(s + b[i]) == cnt + 1){
                  s += a[i];
                  cnt++;
                  break;
              }
          }
      }
  }
  return s;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:30:12: error: no matching function for call to 'std::vector<std::__cxx11::basic_string<char> >::push_back(std::vector<char>&)'
   30 |       vs.pb(b);
      |       ~~~~~^~~
In file included from /usr/include/c++/11/vector:67,
                 from /usr/include/c++/11/functional:62,
                 from /usr/include/c++/11/pstl/glue_algorithm_defs.h:13,
                 from /usr/include/c++/11/algorithm:74,
                 from /usr/include/x86_64-linux-gnu/c++/11/bits/stdc++.h:65,
                 from combo.cpp:2:
/usr/include/c++/11/bits/stl_vector.h:1187:7: note: candidate: 'void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = std::__cxx11::basic_string<char>; _Alloc = std::allocator<std::__cxx11::basic_string<char> >; std::vector<_Tp, _Alloc>::value_type = std::__cxx11::basic_string<char>]'
 1187 |       push_back(const value_type& __x)
      |       ^~~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:1187:35: note:   no known conversion for argument 1 from 'std::vector<char>' to 'const value_type&' {aka 'const std::__cxx11::basic_string<char>&'}
 1187 |       push_back(const value_type& __x)
      |                 ~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/11/bits/stl_vector.h:1203:7: note: candidate: 'void std::vector<_Tp, _Alloc>::push_back(std::vector<_Tp, _Alloc>::value_type&&) [with _Tp = std::__cxx11::basic_string<char>; _Alloc = std::allocator<std::__cxx11::basic_string<char> >; std::vector<_Tp, _Alloc>::value_type = std::__cxx11::basic_string<char>]'
 1203 |       push_back(value_type&& __x)
      |       ^~~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:1203:30: note:   no known conversion for argument 1 from 'std::vector<char>' to 'std::vector<std::__cxx11::basic_string<char> >::value_type&&' {aka 'std::__cxx11::basic_string<char>&&'}
 1203 |       push_back(value_type&& __x)
      |                 ~~~~~~~~~~~~~^~~