Submission #770712

#	Time	Username	Problem	Language	Result	Execution time	Memory
770712		AtinaR	Combo (IOI18_combo)	C++14	Compilation error	0 ms	0 KiB

combo

#include "combo.h"
#include <bits/stdc++.h>
std::string guess_sequence(int N)
{
    char first;
    int f=press("AB");
    if(f>=1)
    {
        f=press("A");
        if(f>=1)
        {
            first='A';
        }
        else
        {
            first='B';
        }
    }
    else
    {
        f=press("X");
        if(f>=1)
        {
            first='X';
        }
        else first='Y';
    }
    string res="";
    res+=first;
    char possible[3];
    if(first=='X')
    {
        possible[0]='A';
        possible[1]='B';
        possible[2]='Y';
    }
    else if(first=='Y')
    {
        possible[0]='A';
        possible[1]='B';
        possible[2]='X';
    }
    else if(first=='A')
    {
        possible[0]='X';
        possible[1]='B';
        possible[2]='Y';
    }
    else if(first=='B')
    {
        possible[0]='A';
        possible[1]='X';
        possible[2]='Y';
    }
    while(res.size()<N)
    {
        int tmp;
        string A=res+possible[0];
        string B=res+possible[1];
        string C=res+possible[2];
        tmp=press(A);
        if(tmp==A.size())
        {
            res=A;
            continue;
        }
        tmp=press(B);
        if(tmp==B.size())
        {
            res=B;
            continue;
        }
        res=C;
    }
    return res;
}

Compilation message (stderr)

combo.cpp: In function 'std::string guess_sequence(int)':
combo.cpp:28:5: error: 'string' was not declared in this scope; did you mean 'std::string'?
   28 |     string res="";
      |     ^~~~~~
      |     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:29:5: error: 'res' was not declared in this scope
   29 |     res+=first;
      |     ^~~
combo.cpp:58:15: error: expected ';' before 'A'
   58 |         string A=res+possible[0];
      |               ^~
      |               ;
combo.cpp:59:15: error: expected ';' before 'B'
   59 |         string B=res+possible[1];
      |               ^~
      |               ;
combo.cpp:60:15: error: expected ';' before 'C'
   60 |         string C=res+possible[2];
      |               ^~
      |               ;
combo.cpp:61:19: error: 'A' was not declared in this scope
   61 |         tmp=press(A);
      |                   ^
combo.cpp:67:19: error: 'B' was not declared in this scope
   67 |         tmp=press(B);
      |                   ^
combo.cpp:73:13: error: 'C' was not declared in this scope
   73 |         res=C;
      |             ^