Borderou de evaluare (job #649587)

Compilare: main.cpp: In function 'int main()': main.cpp:20:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 20 | for (i = 0; i < s.size(); ++i) | ~~^~~~~~~~~~ main.cpp:23:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 23 | for (; i < s.size(); i += 2) | ~~^~~~~~~~~~ main.cpp:41:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 41 | for (i = 2; i < s.size(); ++i) | ~~^~~~~~~~~~