Compilare: main.cpp: In function 'int main()': main.cpp:16:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for ( int i = 0; i < s.length() - 1; ++i ) { | ~~^~~~~~~~~~~~~~~~ main.cpp:24:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for ( int i = 0; i < v.size(); ++i ) { | ~~^~~~~~~~~~