Compilare: main.cpp: In function 'int main()': main.cpp:26:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~ main.cpp:46:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for (int it = 0; it < st.size(); it++) | ~~~^~~~~~~~~~~ main.cpp:24:9: warning: unused variable 'i' [-Wunused-variable] 24 | int i = 0; | ^