Borderou de evaluare (job #644822)

Compilare: main.cpp: In function 'int main()': main.cpp:28:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 28 | for (int k = 1; k < S.size(); ++ k) { | ~~^~~~~~~~~~ main.cpp:49:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'unsigned int'} [-Wsign-compare] 49 | for (int k = 0; k < S.size(); ++ k) | ~~^~~~~~~~~~