Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:34:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for (int i=0; i<l[nod].size (); i++) | ~^~~~~~~~~~~~~~~ main.cpp:51:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for (int i=0; i<l[nod].size (); i++) | ~^~~~~~~~~~~~~~~ main.cpp:57:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for (int j=0; j<pers[vecin].size (); j++) | ~^~~~~~~~~~~~~~~~~~~~ main.cpp:65:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 65 | for (int j=0; j<pers[poz].size (); j++) | ~^~~~~~~~~~~~~~~~~~ In file included from /usr/include/c++/12.2.1/vector:64, from main.cpp:2: In member function 'constexpr void std::vector<_Tp, _Alloc>::_M_erase_at_end(pointer) [with _Tp = int; _Alloc = std::allocator<int>]', inlined from 'constexpr void std::vector<_Tp, _Alloc>::clear() [with _Tp = int; _Alloc = std::allocator<int>]' at /usr/include/c++/12.2.1/bits/stl_vector.h:1601:24, inlined from 'void dfs(int, int)' at main.cpp:67:25: /usr/include/c++/12.2.1/bits/stl_vector.h:1934:37: warning: 'poz' may be used uninitialized [-Wmaybe-uninitialized] 1934 | this->_M_impl._M_finish = __pos; | ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ main.cpp: In function 'void dfs(int, int)': main.cpp:33:9: note: 'poz' was declared here 33 | int poz; | ^~~