/usr/bin/ld: /tmp/cc8mvGHr.o: in function `main': grader.cpp:(.text.startup+0x392): undefined reference to `minimumInstructions(int, int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<std::vector<int, std::allocator<int> >, std::allocator<std::vector<int, std::allocator<int> > > >)' collect2: error: ld returned 1 exit status