Compilare: main.cpp: In function 'int main()': main.cpp:81:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp:85:28: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | if(i == 0 && i + 2 < s.size() && isalpha(s[i + 2])) | ~~~~~~^~~~~~~~~~ main.cpp:87:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | else if(s[i - 1] == ' ' && i + 1 < s.size() && isalpha(s[i + 1])) | ~~~~~~^~~~~~~~~~ main.cpp:92:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for(int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~