Compilare: main.cpp: In function 'int main()': main.cpp:18:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for (i=1;i<s3.size();i++) | ~^~~~~~~~~~ main.cpp:39:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for (i=0;i<aparitii.size();i++) | ~^~~~~~~~~~~~~~~~