platonic8.cpp:5:8: error: deduced class type ‘vector’ in function return type
5 | vector findA(int n, int m) {
| ^~~~~
In file included from /usr/include/c++/9/vector:67,
from platonic8.h:2,
from platonic8.cpp:1:
/usr/include/c++/9/bits/stl_vector.h:386:11: note: ‘template<class _Tp, class _Alloc> class std::vector’ declared here
386 | class vector : protected _Vector_base<_Tp, _Alloc>
| ^~~~~~