Compilare: main.cpp: In function 'int main()': main.cpp:24:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int i = 0; i < s.size(); i++){ | ~~^~~~~~~~~~ main.cpp:50:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for (int i = 0; i < s.size(); i++){ | ~~^~~~~~~~~~ main.cpp:72:13: warning: unused variable 'cnt' [-Wunused-variable] 72 | int cnt = 1; | ^~~