molecules.cpp: In function 'std::vector<int> find_subset(long long int, long long int, std::vector<long long int>)':
molecules.cpp:33:34: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::set<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
33 | for (ll j = 0; j < ans.size(); j++) {
| ~~^~~~~~~~~~~~
molecules.cpp:58:42: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::set<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
58 | for (ll j = 0; j < ans.size(); j++) {
| ~~^~~~~~~~~~~~
/usr/bin/ld: /tmp/ccJlvec3.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