molecules.cpp: In function 'int main()':
molecules.cpp:25:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
25 | for(int i=0;i<result.size();i++){
| ~^~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccuH8kI6.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccJLXHZ6.o:molecules.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccuH8kI6.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