Compilare: main.cpp: In function 'int main()': main.cpp:45:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for (int i=0; i<in_apm.size(); i++) { | ~^~~~~~~~~~~~~~ In file included from /usr/include/c++/12.2.1/vector:64, from /usr/include/c++/12.2.1/functional:62, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:71, from main.cpp:1: In member function 'constexpr void std::vector<_Tp, _Alloc>::push_back(const value_type&) [with _Tp = int; _Alloc = std::allocator<int>]', inlined from 'int main()' at main.cpp:61:41: /usr/include/c++/12.2.1/bits/stl_vector.h:1283:13: warning: 'from_nod' may be used uninitialized [-Wmaybe-uninitialized] 1283 | ++this->_M_impl._M_finish; | ^~ main.cpp: In function 'int main()': main.cpp:44:13: note: 'from_nod' was declared here 44 | int from_nod; | ^~~~~~~~