最近这个问题困扰我半天,我有以下json数据
[
{"prev_node": "0000000000000005","next_node": "0000000000000006"},
{"prev_node": "0000000000000006","next_node": "0000000000000007"},
{"prev_node": "0000000000000006","next_node": "0000000000000008"},
{"prev_node": "0000000000000008","next_node": "0000000000000012"},
{"prev_node": "0000000000000009","next_node": "0000000000000010"},
{"prev_node": "0000000000000010","next_node": "0000000000000011"},
{"prev_node": "0000000000000014","next_node": "0000000000000015"},
{"prev_node": "0000000000000015","next_node": "0000000000000016"},
{"prev_node": "0000000000000016","next_node": "0000000000000017"},
{"prev_node": "0000000000000018","next_node": "0000000000000019"},
{"prev_node": "0000000000000020","next_node": "0000000000000021"},
{"prev_node": "0000000000000019","next_node": "0000000000000020"},
{"prev_node": "0000000000000012","next_node": "0000000000000022"},
{"prev_node": "0000000000000022","next_node": "0000000000000023"},
{"prev_node": "0000000000000023","next_node": "0000000000000009"},
{"prev_node": "0000000000000011","next_node": "0000000000000024"},
{"prev_node": "0000000000000024","next_node": "0000000000000014"},
{"prev_node": "0000000000000017","next_node": "0000000000000025"},
{"prev_node": "0000000000000025","next_node": "0000000000000018"},
{"prev_node": "0000000000000007","next_node": "0000000000000021"},
{"prev_node": null,"next_node": "0000000000000005"},
{"prev_node": "0000000000000021","next_node": null}
]其中,prev_node代表上一个节点,next_node为下一节点.如果prev_node为Null,则代表当前为第一个节点.next_node为null为最后一个节点.根据数据得到以下流程图
求当前深度最深的流程有哪些节点，和流程的有几个分支
注:节点只能向下走
