Compilare: main.cpp: In function 'int main()': main.cpp:23:35: warning: 'void* memset(void*, int, size_t)' clearing an object of type 'class std::vector<long long int>' with no trivial copy-assignment; use assignment or value-initialization instead [-Wclass-memaccess] 23 | memset(graf,0,sizeof(graf)); | ^ In file included from /usr/include/c++/10/vector:67, from main.cpp:3: /usr/include/c++/10/bits/stl_vector.h:389:11: note: 'class std::vector<long long int>' declared here 389 | class vector : protected _Vector_base<_Tp, _Alloc> | ^~~~~~