Submission #1132216

#	Time	Username	Problem	Language	Result	Execution time	Memory
1132216		bobthescience	Combo (IOI18_combo)	C++20	Compilation error	0 ms	0 KiB

combo

#include "combo.h"

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:4:3: error: 'string' was not declared in this scope
    4 |   string p = "";
      |   ^~~~~~
combo.cpp:4:3: note: suggested alternatives:
In file included from /usr/include/c++/11/string:39,
                 from combo.h:3,
                 from combo.cpp:1:
/usr/include/c++/11/bits/stringfwd.h:79:33: note:   'std::string'
   79 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
In file included from combo.h:3,
                 from combo.cpp:1:
/usr/include/c++/11/string:67:11: note:   'std::pmr::string'
   67 |     using string    = basic_string<char>;
      |           ^~~~~~
combo.cpp:6:3: error: 'vector' was not declared in this scope
    6 |   vector<char> add = {'A', 'B', 'X', 'Y'};
      |   ^~~~~~
combo.cpp:6:10: error: expected primary-expression before 'char'
    6 |   vector<char> add = {'A', 'B', 'X', 'Y'};
      |          ^~~~
combo.cpp:7:16: error: 'add' was not declared in this scope
    7 |   for (char c :add) {
      |                ^~~
combo.cpp:8:15: error: could not convert 'c' from 'char' to 'std::string' {aka 'std::__cxx11::basic_string<char>'}
    8 |     if (press(c)) {
      |               ^
      |               |
      |               char
combo.cpp:13:14: error: 'n' was not declared in this scope
   13 |   while (r < n) {
      |              ^
combo.cpp:14:18: error: 'add' was not declared in this scope
   14 |     for (char c :add) {
      |                  ^~~
combo.cpp:15:17: error: 'p' was not declared in this scope
   15 |       if (press(p + c) > r) {
      |                 ^
combo.cpp:18:14: error: expected ';' before '}' token
   18 |         break
      |              ^
      |              ;
   19 |       }
      |       ~       
combo.cpp:22:10: error: 'p' was not declared in this scope
   22 |   return p;
      |          ^