Compilare: user.cpp: In member function ‘Vertex SchieberVishkinLCA::query(Vertex, Vertex) const’: user.cpp:129:32: 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:134:32: 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:157:59: warning: control reaches end of non-void function [-Wreturn-type] for(int i = 0; i < n; ++i) if(tata[i] == i) return i; } ^