Compilare: main.cpp: In function 'int main()': main.cpp:138:19: warning: unused variable 'j' [-Wunused-variable] 138 | long long n,i,j,k,nr,suma = 0; | ^ main.cpp: In member function 'std::pair<int, int> Eduard_Deque::back_element()': main.cpp:132:5: warning: control reaches end of non-void function [-Wreturn-type] 132 | } | ^ main.cpp: In member function 'std::pair<int, int> Eduard_Deque::front_element()': main.cpp:126:5: warning: control reaches end of non-void function [-Wreturn-type] 126 | } | ^