Compilare: user.cpp: In function ‘int main()’: user.cpp:12:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] fv[v[1]]++; ^ user.cpp:21:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fv[v[p]]==0) ^ user.cpp:23:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] fv[v[p]]++; ^ user.cpp:27:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] fv[v[p]]++; ^ user.cpp:37:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] fv[v[u]]--; ^ user.cpp:38:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fv[v[u]]==0)d--; ^ user.cpp:43:5: warning: ‘st’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(i=st;i<=dr;i++) ^