/home/denis/downloads/Lead/Depth-first-search-master/main.cpp:1: ошибка: stray ‘\’ in program
\#include "gui.h"
^
/home/denis/downloads/Lead/Depth-first-search-master/main.cpp:1: ошибка: stray ‘#’ in program
\#include "gui.h"
^
/home/denis/downloads/Lead/Depth-first-search-master/main.cpp:1: ошибка: ‘include’ does not name a type
\#include "gui.h"
^~~~~~~
/usr/include/c++/6/type_traits:359: ошибка: ‘std::size_t’ has not been declared
template<typename _Tp, std::size_t _Size>
^~~~~~