Compilare: user.cpp: In member function ‘Vertex SchieberVishkinLCA::query(Vertex, Vertex) const’: user.cpp:131:32: warning: suggest parentheses around arithmetic in operand of ‘|’ [-Wparentheses] x = pathParents[(indices[v] & ~kMask | (kMask+1))-1]; //indices[v]のkの高さの祖先のパスの親 ^ user.cpp:136:32: warning: suggest parentheses around arithmetic in operand of ‘|’ [-Wparentheses] y = pathParents[(indices[u] & ~kMask | (kMask+1))-1]; //indices[u]のkの高さの祖先のパスの親 ^ user.cpp: In function ‘int build_cartesian_tree()’: user.cpp:166:43: warning: array subscript has type ‘char’ [-Wchar-subscripts] fii[tata[i]][nr_fii[tata[i]]++] = i; ^ user.cpp:169:23: warning: control reaches end of non-void function [-Wreturn-type] return i; } ^