九度OJ-题目1509：树中两个结点的最低公共祖先的测试数据

21 1 2 3 4 0 0 0 0 0 3 4 1 2 3 4 0 0 0 0 0 1 2 1 200 0 0 0 1 200 1 200 0 0 300 0 0 200 30 1 2 4 6 0 0 7 0 0 5 8 0 0 9 0 0 3 0 0 6 8 1 2 4 6 0 0 7 0 0 5 8 0 0 9 0 0 3 0 0 6 12 1 2 4 6 0 0 7 0 0 5 8 0 0 9 0 0 3 0 0 12 14 1 2 4 6 0 0 7 0 0 5 8 0 0 9 0 0 3 0 0 6 7 1 2 4 6 0 0 7 0 0 5 8 0 0 9 0 0 3 0 0 2 9 1 2 4 6 0 0 7 0 0 5 8 0 0 9 0 0 3 0 0 1 9 1 2 4 6 0 0 7 0 0 5 8 0 0 9 0 0 3 0 0 2 3 1 2 4 6 0 0 7 0 0 5 8 0 0 9 0 0 3 0 0 7 7 1 2 4 6 0 0 7 0 0 5 8 0 0 9 0 0 3 0 0 7 8 1 2 4 6 0 0 7 0 0 5 8 0 0 9 0 0 3 0 0 8 3 1 2 0 0 2 0 0 2 2 1 2 0 0 2 0 0 1 2 1 2 0 0 3 0 0 2 3 1 2 0 0 3 0 0 2 2 1 2 0 2 0 0 0 2 2 1 2 0 2 0 0 2 0 0 2 2 1 0 0 1 1