Compilare: user.cpp: In function ‘int main()’: user.cpp:21:20: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(fr[v[dr]]==0){ ^ user.cpp:23:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] fr[v[dr]]++; ^ user.cpp:33:40: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(i<dr&&fr[v[i]]>1){ ^ user.cpp:34:32: warning: array subscript has type ‘char’ [-Wchar-subscripts] fr[v[i]]--; ^ user.cpp:37:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] fr[v[i]]=0; ^ user.cpp:47:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] fr[v[dr]]++; ^