Borderou de evaluare (job #723709)

Compilare: main.cpp: In function 'int main()': main.cpp:27:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 27 | for(int i=0; i<s.size()-1; i++) | ~^~~~~~~~~~~ main.cpp:32:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 32 | for(int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:38:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 38 | for(int i=0; i<s.size(); i++) | ~^~~~~~~~~ main.cpp:19:10: warning: unused variable 'x' [-Wunused-variable] 19 | char x; | ^