Compilare: main.cpp: In function 'std::__cxx11::list<int> pluss(std::__cxx11::list<int>, std::__cxx11::list<int>)': main.cpp:67:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int d = 0; d < B.size(); d++) { ~~^~~~~~~~~~ main.cpp: In function 'std::__cxx11::list<int> solve(int)': main.cpp:130:7: warning: value computed is not used [-Wunused-value] *p++; ^~~~