Compilare: main.cpp:8:11: warning: built-in function 'pow' declared as non-function [-Wbuiltin-declaration-mismatch] 8 | long long pow[31]; | ^~~ main.cpp: In function 'int main()': main.cpp:29:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i = 0; i < s.size(); i++) | ~~^~~~~~~~~~