Method GetParent

library/cpp/par/distr_tree.cpp:51–63

        TVector<TDistrTree> Group;

        int GetParent(int id) {
            int res = id, parent = id;
            while (parent != -1) {
                res = parent;
                parent = Group2parent[res];
                if (parent == res) {
                    Y_ASSERT(id == res);
                    break;
                }
            }
            Group2parent[id] = res;
            return res;
        }
        TDistrTreeConstructor(int nodeCount) {
            //    TVector<TTreeConnectorCost> usedLinks;
            Group2parent.resize(nodeCount, -1);