Compilare: main.cpp:4: warning: ignoring '#pragma optimize GCC' [-Wunknown-pragmas] 4 | #pragma optimize GCC ("Ofast") | main.cpp: In function 'int cb(int, int)': main.cpp:61:9: warning: unused variable 'med' [-Wunused-variable] 61 | int med, last = -1; | ^~~ main.cpp: In function 'int main()': main.cpp:99:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | for (int j = 0; j < s.size(); ++j) | ~~^~~~~~~~~~