Compilare: user.cpp: In function ‘int main()’: user.cpp:23:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[ s[i] ] ++; ^ user.cpp:41:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] sol += f[ a[i] ]; ^ user.cpp:44:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[ a[i] ] = b[i]; ^ user.cpp:47:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] L[i] = i - f[ s[i] ]; ^ user.cpp:50:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] R[i] = i + f[ s[i] ]; ^