View Compilation Error

0_0_3814864_19874.cpp: In function `int process(std::vector<std::string, std::allocator<std::string> >)':
0_0_3814864_19874.cpp:9: error: `set' undeclared (first use this function)
0_0_3814864_19874.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3814864_19874.cpp:9: error: expected primary-expression before '>' token
0_0_3814864_19874.cpp:9: error: `sAns' undeclared (first use this function)
0_0_3814864_19874.cpp:11: error: `iLen' undeclared (first use this function)
0_0_3814864_19874.cpp:13: error: no matching function for call to `sort(std::basic_string<char, std::char_traits<char>, std::allocator<char> >&)'