Compilare: user.cpp: In function ‘void Solve()’: user.cpp:41:12: warning: array subscript has type ‘char’ [-Wchar-subscripts] ap[a[1]] = 1; ^ user.cpp:44:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if ( q.size() > lmax ) ^ user.cpp:52:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] ap[a[j]]++; ^ user.cpp:53:21: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( ap[a[j]] == 1 ) ^ user.cpp:57:25: warning: array subscript has type ‘char’ [-Wchar-subscripts] ap[q.front()]--; ^ user.cpp:58:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] if ( ap[q.front()] == 0 ) ^