Compilare: main.cpp: In function 'int main()': main.cpp:15:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i = 0;i < s.size();i++) | ~~^~~~~~~~~~ main.cpp:26:21: 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:13:9: warning: unused variable 'n' [-Wunused-variable] 13 | int n,cnt = 0; | ^