Compilare: main.cpp: In function 'std::vector<punct> get_NSEV(std::vector<punct>)': main.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < v.size(); i++){ ~~^~~~~~~~~~ main.cpp: In function 'bool valid(int, std::vector<punct>, int)': main.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < colturi.size(); i++){ ~~^~~~~~~~~~~~~~~~