Compilare: main.cpp: In function 'long long int hashFunc(std::__cxx11::string)': main.cpp:17:48: warning: array subscript has type 'char' [-Wchar-subscripts] hash = hash*3LL + 1LL*cod[word[len-i-1]]; ^ main.cpp: In function 'int main()': main.cpp:32:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (len > str.size()) { ~~~~^~~~~~~~~~~~ main.cpp:40:54: warning: array subscript has type 'char' [-Wchar-subscripts] hash = hash*3LL + 1LL*cod[str[str.size()-i-1]]; ^ main.cpp:46:41: warning: array subscript has type 'char' [-Wchar-subscripts] hash = hash - 1LL*cod[str[i+len]]*p; ^ main.cpp:47:41: warning: array subscript has type 'char' [-Wchar-subscripts] hash = hash*3LL + 1LL*cod[str[i]]; ^