Compilare: main.cpp: In function 'int main()': main.cpp:28:6: warning: unused variable 'number' [-Wunused-variable] 28 | int number = 0; | ^~~~~~ main.cpp: In function 'std::multiset<int> checkFrecvs(std::multiset<int>, std::multiset<int>)': main.cpp:15:1: warning: control reaches end of non-void function [-Wreturn-type] 15 | } | ^