Method seq

code/graph/tarjan_olca.test.cpp:113–120

  }

  void seq(vi *c, int r) {
    start[label[r]] = size(s);
    s.push_back(label[r]);
    for (int i = 0; i < size(c[r]); i++) {
      seq(c, c[r][i]);
      s.push_back(label[r]);
    }
  }

  int lca(int a, int b) {
    a = label[a];