Borderou de evaluare (job #801234)

Compilare: main.cpp: In function 'int main()': main.cpp:20:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 20 | while(i<s.size()) | ~^~~~~~~~~ main.cpp:25:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 25 | while(i<s.size() && isalpha(s[i])!=0) | ~^~~~~~~~~