Compilare: main.cpp: In function 'int main()': main.cpp:50:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | while(a<A[mini].s.size() && b<A[maxi].s.size() && A[mini].s[a]==A[maxi].s[b]) | ~^~~~~~~~~~~~~~~~~ main.cpp:50:38: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | while(a<A[mini].s.size() && b<A[maxi].s.size() && A[mini].s[a]==A[maxi].s[b]) | ~^~~~~~~~~~~~~~~~~