摘要："题面" 解析 这题思路挺秒啊. ~~本麻瓜终于找了道好题了(还成功把ztlztl大仙拖下水了)~~ 看到叶子节点数 include include include include define int long long define fre(x) freopen(x".in","r",stdin 阅读全文