Borderou de evaluare (job #497028)

Compilare: main.cpp: In function 'int main()': main.cpp:14:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 14 | for(i=0;i<a.length();i++) | ~^~~~~~~~~~~ main.cpp:60:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 60 | while(f<a.length()) | ~^~~~~~~~~~~