Compilare: main.cpp: In function 'int main()': main.cpp:15:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 15 | for(int i = 0; i < s.size(); i++) { | ~~^~~~~~~~~~ main.cpp:11:23: warning: variable 'ultx' set but not used [-Wunused-but-set-variable] 11 | int x = 0, y = 0, ultx = 0, ulty = 0; | ^~~~