Compilare: main.cpp: In function 'int main()': main.cpp:36:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i=0;i<s.size();++i) | ~^~~~~~~~~ main.cpp:70:33: warning: 'config' may be used uninitialized in this function [-Wmaybe-uninitialized] 70 | freq[config]++; | ~~~~~~~~~~~~^~