/tmp/cc90SKfH.o(.text+0x17): In function `main':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)'
/tmp/cc90SKfH.o(.text+0x24): In function `main':
: undefined reference to `std::cout'
/tmp/cc90SKfH.o(.text+0x29): In function `main':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
/tmp/cc90SKfH.o(.text+0x32): In function `main':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))'
/tmp/cc90SKfH.o(.text+0x44): In function `main':
: undefined reference to `std::cin'
/tmp/cc90SKfH.o(.text+0x49): In function `main':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::operator>>(int&)'
/tmp/cc90SKfH.o(.text+0x6b): In function `main':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)'
/tmp/cc90SKfH.o(.text+0x78): In function `main':
: undefined reference to `std::cout'
/tmp/cc90SKfH.o(.text+0x7d): In function `main':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
/tmp/cc90SKfH.o(.text+0x86): In function `main':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))'
/tmp/cc90SKfH.o(.text+0x9d): In function `main':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)'
/tmp/cc90SKfH.o(.text+0xaa): In function `main':
: undefined reference to `std::cout'
/tmp/cc90SKfH.o(.text+0xaf): In function `main':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >& std::operator<< <std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&, char const*)'
/tmp/cc90SKfH.o(.text+0xb8): In function `main':
: undefined reference to `std::basic_ostream<char, std::char_traits<char> >::operator<<(std::basic_ostream<char, std::char_traits<char> >& (*)(std::basic_ostream<char, std::char_traits<char> >&))'
/tmp/cc90SKfH.o(.text+0xf0): In function `main':
: undefined reference to `std::cin'
/tmp/cc90SKfH.o(.text+0xf5): In function `main':
: undefined reference to `std::basic_istream<char, std::char_traits<char> >::operator>>(int&)'
/tmp/cc90SKfH.o(.text+0x136): In function `__static_initialization_and_destruction_0(int, int)':
: undefined reference to `std::ios_base::Init::Init[in-charge]()'
/tmp/cc90SKfH.o(.text+0x165): In function `__tcf_0':
: undefined reference to `std::ios_base::Init::~Init [in-charge]()'
/tmp/cc90SKfH.o(.eh_frame+0x11): undefined reference to `__gxx_personality_v0'
collect2: ld returned 1 exit status