molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:6:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
6 | for(int i=0;i<w.size();i++){
| ~^~~~~~~~~
molecules.cpp:9:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
9 | for(int i=0;i<w.size();i++){
| ~^~~~~~~~~
molecules.cpp:22:1: warning: control reaches end of non-void function [-Wreturn-type]
22 | }
| ^