Compilare: main.cpp: In function 'int main()': main.cpp:64:31: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 64 | while(who!=0&&s.size()<lg) | ~~~~~~~~^~~ main.cpp:84:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<date>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 84 | for(int i=0;i<e.size();i++) | ~^~~~~~~~~