Compilare: main.cpp: In function 'int main()': main.cpp:35:59: warning: ignoring return value of 'std::deque<_Tp, _Alloc>::reference std::deque<_Tp, _Alloc>::front() [with _Tp = long long int; _Alloc = std::allocator<long long int>; reference = long long int&]', declared with attribute 'nodiscard' [-Wunused-result] 35 | if (!dq2.empty() && i - dq1.front() > k) dq1.front(); | ~~~~~~~~~^~ In file included from /usr/include/c++/12.2.1/deque:64, from /usr/include/c++/12.2.1/x86_64-pc-linux-gnu/bits/stdc++.h:68, from main.cpp:1: /usr/include/c++/12.2.1/bits/stl_deque.h:1444:7: note: declared here 1444 | front() _GLIBCXX_NOEXCEPT | ^~~~~