Compilare: main.cpp: In function 'void supertree(int, int, relt)': main.cpp:72:24: warning: unused variable 'z' [-Wunused-variable] 72 | int y = p.first; int z = p.second; | ^ main.cpp: In member function 'void one_set_to_rule_them_all::insert(long long int, int)': main.cpp:95:16: warning: comparison of integer expressions of different signedness: 'std::multiset<long long int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 95 | if(s2.size() > k) { | ~~~~~~~~~~^~~