Compilare: main.cpp: In function 'long long int divide(Pii*, int)': main.cpp:47:26: warning: 'void* memcpy(void*, const void*, size_t)' writing to an object of type 'using Pii = struct std::pair<int, int>' {aka 'struct std::pair<int, int>'} with no trivial copy-assignment; use copy-assignment or copy-initialization instead [-Wclass-memaccess] 47 | memcpy(a, temp, n * 8); | ^ In file included from /usr/include/c++/10/bits/stl_algobase.h:64, from /usr/include/c++/10/bits/char_traits.h:39, from /usr/include/c++/10/ios:40, from /usr/include/c++/10/istream:38, from /usr/include/c++/10/sstream:38, from /usr/include/c++/10/complex:45, from /usr/include/c++/10/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:54, from main.cpp:1: /usr/include/c++/10/bits/stl_pair.h:211:12: note: 'using Pii = struct std::pair<int, int>' {aka 'struct std::pair<int, int>'} declared here 211 | struct pair | ^~~~