/usr/bin/ld: /tmp/cc7Xbkt3.o: in function `Query(std::vector<int, std::allocator<int> > const&)':
grader.cpp:(.text+0x50): multiple definition of `Query(std::vector<int, std::allocator<int> > const&)'; /tmp/ccnYP6r5.o:dango3.cpp:(.text+0x190): first defined here
/usr/bin/ld: /tmp/cc7Xbkt3.o: in function `Answer(std::vector<int, std::allocator<int> > const&)':
grader.cpp:(.text+0x1c0): multiple definition of `Answer(std::vector<int, std::allocator<int> > const&)'; /tmp/ccnYP6r5.o:dango3.cpp:(.text+0x1c0): first defined here
/usr/bin/ld: /tmp/cc7Xbkt3.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccnYP6r5.o:dango3.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status