Submission #161090

#	Time	Username	Problem	Language	Result	Execution time	Memory
161090		giorgikob	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include <string>
std::string guess_sequence(int N) {
    std::string S = "";
    
    int x = press("AB");
    if(x == 1){
        x = press("A");
        if(x==1){
            S += 'A';
        } else {
            S += 'B';
        }
    } else {
        x = press("X");
        if(x==1){
            S += "X";
        } else {
            S += "Y";
        }
    }
    
    string c1,c2,c3;
    if(S=="X") c1 = "A", c2 = "B", c3 = "Y";
    if(S=="Y") c1 = "A", c2 = "B", c3 = "X";
    if(S=="A") c1 = "B", c2 = "X", c3 = "Y";
    if(S=="B") c1 = "A", c2 = "X", c3 = "Y";
    
    for(int i=1;i<N;i++){
        int x = (S+c1+S+c2+c1+S+c2+c2+S+c2+c3);
        if(x==S.size());
        S += c3;
        if(x==S.size()+1)
        S += c1;
        if(x==S.size()+2)
        S += c2;
    }
    
    return S;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:23:5: error: 'string' was not declared in this scope; did you mean 'std::string'?
   23 |     string c1,c2,c3;
      |     ^~~~~~
      |     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:24:16: error: 'c1' was not declared in this scope
   24 |     if(S=="X") c1 = "A", c2 = "B", c3 = "Y";
      |                ^~
combo.cpp:24:26: error: 'c2' was not declared in this scope
   24 |     if(S=="X") c1 = "A", c2 = "B", c3 = "Y";
      |                          ^~
combo.cpp:24:36: error: 'c3' was not declared in this scope
   24 |     if(S=="X") c1 = "A", c2 = "B", c3 = "Y";
      |                                    ^~
combo.cpp:25:16: error: 'c1' was not declared in this scope
   25 |     if(S=="Y") c1 = "A", c2 = "B", c3 = "X";
      |                ^~
combo.cpp:25:26: error: 'c2' was not declared in this scope
   25 |     if(S=="Y") c1 = "A", c2 = "B", c3 = "X";
      |                          ^~
combo.cpp:25:36: error: 'c3' was not declared in this scope
   25 |     if(S=="Y") c1 = "A", c2 = "B", c3 = "X";
      |                                    ^~
combo.cpp:26:16: error: 'c1' was not declared in this scope
   26 |     if(S=="A") c1 = "B", c2 = "X", c3 = "Y";
      |                ^~
combo.cpp:26:26: error: 'c2' was not declared in this scope
   26 |     if(S=="A") c1 = "B", c2 = "X", c3 = "Y";
      |                          ^~
combo.cpp:26:36: error: 'c3' was not declared in this scope
   26 |     if(S=="A") c1 = "B", c2 = "X", c3 = "Y";
      |                                    ^~
combo.cpp:27:16: error: 'c1' was not declared in this scope
   27 |     if(S=="B") c1 = "A", c2 = "X", c3 = "Y";
      |                ^~
combo.cpp:27:26: error: 'c2' was not declared in this scope
   27 |     if(S=="B") c1 = "A", c2 = "X", c3 = "Y";
      |                          ^~
combo.cpp:27:36: error: 'c3' was not declared in this scope
   27 |     if(S=="B") c1 = "A", c2 = "X", c3 = "Y";
      |                                    ^~
combo.cpp:30:20: error: 'c1' was not declared in this scope
   30 |         int x = (S+c1+S+c2+c1+S+c2+c2+S+c2+c3);
      |                    ^~
combo.cpp:30:25: error: 'c2' was not declared in this scope
   30 |         int x = (S+c1+S+c2+c1+S+c2+c2+S+c2+c3);
      |                         ^~
combo.cpp:30:44: error: 'c3' was not declared in this scope
   30 |         int x = (S+c1+S+c2+c1+S+c2+c2+S+c2+c3);
      |                                            ^~
combo.cpp:31:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |         if(x==S.size());
      |            ~^~~~~~~~~~
combo.cpp:33:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |         if(x==S.size()+1)
      |            ~^~~~~~~~~~~~
combo.cpp:35:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         if(x==S.size()+2)
      |            ~^~~~~~~~~~~~