Compilare: main.cpp: In function 'void add(Node*&, std::__cxx11::string, int)': main.cpp:59:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k == s.size()) { ~~^~~~~~~~~~~ main.cpp:72:17: warning: overflow in implicit constant conversion [-Woverflow] int maxim = -INF, maxi = 0; ^~~~ main.cpp: In function 'std::__cxx11::string Reconstruieste()': main.cpp:102:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(sol.size() < kk) ~~~~~~~~~~~^~~~