Compilare: user.cpp: In function ‘int main()’: user.cpp:32:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] poss[code[A[i]]].push_back(i); ^ user.cpp:36:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] int x = code[B[i]], y = code[A[i]], o1, o2; ^ user.cpp:36:46: warning: array subscript has type ‘char’ [-Wchar-subscripts] int x = code[B[i]], y = code[A[i]], o1, o2; ^ user.cpp:56:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] int x = code[B[i]], y = pr[i], o1, o2; ^