Compilare: 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>::clear() [with _Tp = int; _Alloc = std::allocator<int>]', inlined from 'void init()' at main.cpp:18:19: /usr/include/c++/12.2.1/bits/stl_vector.h:1601:24: warning: iteration 15004 invokes undefined behavior [-Waggressive-loop-optimizations] 1601 | { _M_erase_at_end(this->_M_impl._M_start); } | ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void init()': main.cpp:17:19: note: within this loop 17 | for(int i=1; i<=N; ++i){ | ~^~~