/usr/bin/ld: /tmp/ccPt2MAn.o: in function `Answer(int, int)':
grader.cpp:(.text+0x30): multiple definition of `Answer(int, int)'; /tmp/ccCJyO2t.o:chameleon.cpp:(.text+0x30): first defined here
/usr/bin/ld: /tmp/ccPt2MAn.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccCJyO2t.o:chameleon.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccPt2MAn.o: in function `Query(std::vector<int, std::allocator<int> > const&)':
grader.cpp:(.text+0xb0): multiple definition of `Query(std::vector<int, std::allocator<int> > const&)'; /tmp/ccCJyO2t.o:chameleon.cpp:(.text+0xb0): first defined here
collect2: error: ld returned 1 exit status