Compilare: main.cpp: In function 'int main()': main.cpp:28:40: warning: ignoring return value of 'std::deque<_Tp, _Alloc>::reference std::deque<_Tp, _Alloc>::front() [with _Tp = int; _Alloc = std::allocator<int>; reference = int&]', declared with attribute 'nodiscard' [-Wunused-result] 28 | dq_dismin.front(); | ~~~~~~~~~~~~~~~^~ In file included from /usr/include/c++/12.2.1/deque:64, from /usr/include/c++/12.2.1/queue:60, from main.cpp:3: /usr/include/c++/12.2.1/bits/stl_deque.h:1444:7: note: declared here 1444 | front() _GLIBCXX_NOEXCEPT | ^~~~~ main.cpp:31:40: warning: ignoring return value of 'std::deque<_Tp, _Alloc>::reference std::deque<_Tp, _Alloc>::front() [with _Tp = int; _Alloc = std::allocator<int>; reference = int&]', declared with attribute 'nodiscard' [-Wunused-result] 31 | dq_dismax.front(); | ~~~~~~~~~~~~~~~^~ /usr/include/c++/12.2.1/bits/stl_deque.h:1444:7: note: declared here 1444 | front() _GLIBCXX_NOEXCEPT | ^~~~~