Anna.cpp: In function 'long long int Bruno(std::vector<int>)':
Anna.cpp:18:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
18 | for (int i = 0; i < u.size(); i ++)
| ~~^~~~~~~~~~
/usr/bin/ld: /tmp/ccnnoG17.o: in function `main':
grader_anna.cpp:(.text.startup+0xd2): undefined reference to `Declare()'
/usr/bin/ld: grader_anna.cpp:(.text.startup+0x1d5): undefined reference to `Anna(long long)'
collect2: error: ld returned 1 exit status
/usr/bin/ld: /tmp/ccZfDlUR.o: in function `main':
grader_bruno.cpp:(.text.startup+0x3ab): undefined reference to `Bruno(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status