Compilare: user.cpp: In function ‘int main()’: user.cpp:21:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<strlen(s);i++) ^ user.cpp:42:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[a[i][a[i][0]]-96]=v[a[i][1]-96]+1; ^ user.cpp:43:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] ult[a[i][a[i][0]]-96]=i; ^ user.cpp:47:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] if (!v[a[i][a[i][0]]-96]) ^ user.cpp:49:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[a[i][a[i][0]]-96]=1; ^ user.cpp:50:33: warning: array subscript has type ‘char’ [-Wchar-subscripts] ult[a[i][a[i][0]]-96]=i; ^