摘要:
浅谈$K D$ $Tree$: "https://www.cnblogs.com/AKMer/p/10387266.html" 题目传送门: "https://lydsy.com/JudgeOnline/problem.php?id=3489" 主席树套主席树写法: "https://www.cnb 阅读全文
摘要:
浅谈$K D\ Tree$: "https://www.cnblogs.com/AKMer/p/10387266.html" 题目传送门: "https://lydsy.com/JudgeOnline/problem.php?id=4130" 这题跟 "$BZOJ4358:permu$" 一样。 不 阅读全文