molecules.cpp: In function 'std::vector<long long int> find_subset(int, int, std::vector<long long int>)':
molecules.cpp:8:35: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
8 | for(long long int loop = 1; loop <= w.size(); ++loop) {
| ~~~~~^~~~~~~~~~~
/usr/bin/ld: /tmp/ccsES7UN.o: in function `main':
grader.cpp:(.text.startup+0x18d): undefined reference to `find_subset(int, int, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status