Submission #1132227

#	Time	Username	Problem	Language	Result	Execution time	Memory
1132227		bobthescience	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

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


std::string guess_sequence(int N) {
  string p = "";
  int r = 1, ord;
  vector<char> add = {'A', 'B', 'X', 'Y'};
  for (char c :add) {
    if (press(c)) {
      add.erase(c);
      break;
    }
  }
  while (r < n) {
    for (char c :add) {
      if (press(p + c) > r) {
        r++;
        p += c;
        break
      }
    }
  }
  return p;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:11:15: error: could not convert 'c' from 'char' to 'std::string' {aka 'std::__cxx11::basic_string<char>'}
   11 |     if (press(c)) {
      |               ^
      |               |
      |               char
combo.cpp:12:16: error: no matching function for call to 'std::vector<char>::erase(char&)'
   12 |       add.erase(c);
      |       ~~~~~~~~~^~~
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:1:
/usr/include/c++/11/bits/stl_vector.h:1430:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::erase(std::vector<_Tp, _Alloc>::const_iterator) [with _Tp = char; _Alloc = std::allocator<char>; std::vector<_Tp, _Alloc>::iterator = std::vector<char>::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<char>::const_iterator]'
 1430 |       erase(const_iterator __position)
      |       ^~~~~
/usr/include/c++/11/bits/stl_vector.h:1430:28: note:   no known conversion for argument 1 from 'char' to 'std::vector<char>::const_iterator'
 1430 |       erase(const_iterator __position)
      |             ~~~~~~~~~~~~~~~^~~~~~~~~~
/usr/include/c++/11/bits/stl_vector.h:1457:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::erase(std::vector<_Tp, _Alloc>::const_iterator, std::vector<_Tp, _Alloc>::const_iterator) [with _Tp = char; _Alloc = std::allocator<char>; std::vector<_Tp, _Alloc>::iterator = std::vector<char>::iterator; std::vector<_Tp, _Alloc>::const_iterator = std::vector<char>::const_iterator]'
 1457 |       erase(const_iterator __first, const_iterator __last)
      |       ^~~~~
/usr/include/c++/11/bits/stl_vector.h:1457:7: note:   candidate expects 2 arguments, 1 provided
combo.cpp:16:14: error: 'n' was not declared in this scope
   16 |   while (r < n) {
      |              ^
combo.cpp:21:14: error: expected ';' before '}' token
   21 |         break
      |              ^
      |              ;
   22 |       }
      |       ~