[哈希表（散列表）](%E5%93%88%E5%B8%8C%E8%A1%A8%EF%BC%88%E6%95%A3%E5%88%97%E8%A1%A8%EF%BC%89.md) [异或运算](%E5%BC%82%E6%88%96yunsuan.md) [leetcode](leetcode.md) [KD树(K-Dimension Tree)](%E9%AB%98%E7%BA%A7%E6%95%B0%E6%8D%AE%E7%BB%93%E6%9E%84%E2%80%94%E2%80%94KD%E6%A0%91K-DimensionTree.md) [Rtree](Rtree.md)