/tmp/cc2MImZt.o: In function `helper::read_int()':
grader.cpp:(.text+0x0): multiple definition of `helper::read_int()'
/tmp/ccXIROEl.o:messy.cpp:(.text+0x0): first defined here
/tmp/cc2MImZt.o: In function `get_p(int)':
grader.cpp:(.text+0x50): multiple definition of `get_p(int)'
/tmp/ccXIROEl.o:messy.cpp:(.text+0x50): first defined here
/tmp/cc2MImZt.o:(.bss+0x10): multiple definition of `helper::p'
/tmp/ccXIROEl.o:(.bss+0x230): first defined here
/tmp/cc2MImZt.o: In function `wa()':
grader.cpp:(.text+0x70): multiple definition of `wa()'
/tmp/ccXIROEl.o:messy.cpp:(.text+0x70): first defined here
/tmp/cc2MImZt.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccXIROEl.o:messy.cpp:(.text.startup+0x0): first defined here
/tmp/cc2MImZt.o:(.bss+0x28): multiple definition of `helper::n'
/tmp/ccXIROEl.o:(.bss+0x248): first defined here
/tmp/cc2MImZt.o:(.bss+0x4): multiple definition of `helper::w'
/tmp/ccXIROEl.o:(.bss+0x224): first defined here
/tmp/cc2MImZt.o:(.bss+0x0): multiple definition of `helper::r'
/tmp/ccXIROEl.o:(.bss+0x220): first defined here
/tmp/cc2MImZt.o:(.bss+0x2c): multiple definition of `helper::compiled'
/tmp/ccXIROEl.o:(.bss+0x24c): first defined here
/tmp/cc2MImZt.o: In function `check(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
grader.cpp:(.text+0xa0): multiple definition of `check(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)'
/tmp/ccXIROEl.o:messy.cpp:(.text+0xa0): first defined here
/tmp/cc2MImZt.o: In function `check_element(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
grader.cpp:(.text+0xf0): multiple definition of `check_element(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'
/tmp/ccXIROEl.o:messy.cpp:(.text+0xf0): first defined here
/tmp/cc2MImZt.o:(.bss+0x40): multiple definition of `helper::set_[abi:cxx11]'
/tmp/ccXIROEl.o:(.bss+0x260): first defined here
/tmp/cc2MImZt.o: In function `add_element(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)':
grader.cpp:(.text+0x250): multiple definition of `add_element(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >)'
/tmp/ccXIROEl.o:messy.cpp:(.text+0x250): first defined here
/tmp/cc2MImZt.o: In function `compile_set()':
grader.cpp:(.text+0x2b0): multiple definition of `compile_set()'
/tmp/ccXIROEl.o:messy.cpp:(.text+0x2b0): first defined here
collect2: error: ld returned 1 exit status