Submission #372935

#TimeUsernameProblemLanguageResultExecution timeMemory
372935mariowongCombo (IOI18_combo)C++14
Compilation error
0 ms0 KiB
#include "combo.h" std::string guess_sequence(int N) { string p,S; char f,s,t; if (press("AB") >= 1){ if (press("A") == 1) S+='A'; else S+='B'; } else { if (press("X") == 1) S+='X'; else S+='Y'; } for (int i = 2; i < N; i++){ p.clear(); if (S[0] == 'A'){ p+=S; p+='B'; p+=S; p+='X'; p+='X'; p+=S; p+='X'; p+='Y'; p+=S; p+='X'; p+='B'; f='B'; s='X'; t='Y'; } if (S[0] == 'B'){ p+=S; p+='A'; p+=S; p+='X'; p+='X'; p+=S; p+='X'; p+='Y'; p+=S; p+='X'; p+='A'; f='A'; s='X'; t='Y'; } if (S[0] == 'X'){ p+=S; p+='A'; p+=S; p+='B'; p+='B'; p+=S; p+='B'; p+='Y'; p+=S; p+='B'; p+='A'; f='A'; s='B'; t='Y'; } if (S[0] == 'Y'){ p+=S; p+='A'; p+=S; p+='B'; p+='B'; p+=S; p+='B'; p+='X'; p+=S; p+='B'; p+='A'; f='A'; s='B'; t='X'; } int ct=press(p); if (ct == i) S+=f; else if (ct == i-1) S+=t; else S+=s; } if (S[0] == 'A'){ p=S+'B'; if (press(p) == N) return p; p=S+'X'; if (press(p) == N) return p; p=S+'Y'; return p; } if (S[0] == 'B'){ p=S+'A'; if (press(p) == N) return p; p=S+'X'; if (press(p) == N) return p; p=S+'Y'; return p; } if (S[0] == 'X'){ p=S+'A'; if (press(p) == N) return p; p=S+'B'; if (press(p) == N) return p; p=S+'Y'; return p; } if (S[0] == 'Y'){ p=S+'B'; if (press(p) == N) return p; p=S+'X'; if (press(p) == N) return p; p=S+'A'; return p; } }

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:4:2: error: 'string' was not declared in this scope; did you mean 'std::string'?
    4 |  string p,S;
      |  ^~~~~~
      |  std::string
In file included from /usr/include/c++/10/string:39,
                 from combo.h:3,
                 from combo.cpp:1:
/usr/include/c++/10/bits/stringfwd.h:79:33: note: 'std::string' declared here
   79 |   typedef basic_string<char>    string;
      |                                 ^~~~~~
combo.cpp:8:3: error: 'S' was not declared in this scope
    8 |   S+='A';
      |   ^
combo.cpp:10:3: error: 'S' was not declared in this scope
   10 |   S+='B';
      |   ^
combo.cpp:15:3: error: 'S' was not declared in this scope
   15 |   S+='X';
      |   ^
combo.cpp:17:3: error: 'S' was not declared in this scope
   17 |   S+='Y';
      |   ^
combo.cpp:20:3: error: 'p' was not declared in this scope
   20 |   p.clear();
      |   ^
combo.cpp:21:7: error: 'S' was not declared in this scope
   21 |   if (S[0] == 'A'){
      |       ^
combo.cpp:28:7: error: 'S' was not declared in this scope
   28 |   if (S[0] == 'B'){
      |       ^
combo.cpp:35:7: error: 'S' was not declared in this scope
   35 |   if (S[0] == 'X'){
      |       ^
combo.cpp:42:7: error: 'S' was not declared in this scope
   42 |   if (S[0] == 'Y'){
      |       ^
combo.cpp:51:3: error: 'S' was not declared in this scope
   51 |   S+=f;
      |   ^
combo.cpp:54:3: error: 'S' was not declared in this scope
   54 |   S+=t;
      |   ^
combo.cpp:56:3: error: 'S' was not declared in this scope
   56 |   S+=s;
      |   ^
combo.cpp:58:6: error: 'S' was not declared in this scope
   58 |  if (S[0] == 'A'){
      |      ^
combo.cpp:59:3: error: 'p' was not declared in this scope
   59 |   p=S+'B';
      |   ^
combo.cpp:68:6: error: 'S' was not declared in this scope
   68 |  if (S[0] == 'B'){
      |      ^
combo.cpp:69:3: error: 'p' was not declared in this scope
   69 |   p=S+'A';
      |   ^
combo.cpp:78:6: error: 'S' was not declared in this scope
   78 |  if (S[0] == 'X'){
      |      ^
combo.cpp:79:3: error: 'p' was not declared in this scope
   79 |   p=S+'A';
      |   ^
combo.cpp:88:6: error: 'S' was not declared in this scope
   88 |  if (S[0] == 'Y'){
      |      ^
combo.cpp:89:3: error: 'p' was not declared in this scope
   89 |   p=S+'B';
      |   ^