Compilare: user.cpp: In function ‘void build_bcd()’: user.cpp:18:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] bcr[a[i]] = i; ^ user.cpp: In function ‘int main()’: user.cpp:83:44: warning: array subscript has type ‘char’ [-Wchar-subscripts] i += max(gsr[k + 1], k - bcr[b[i + k]] + 1); ^