来源:《斯坦福数据挖掘教程第三版》对应的公开英文书和PPT。
Chapter 10 Mining Social-Network Graphs
The essential characteristics of a social network are:
There is a collection of entities that participate in the network. Typically, these entiti…
Idea 需计算数组nums在下标right 和 left-1 的前缀和,然后计算两个前缀和的差即可。 需要注意的是,当left为0的时候,如果还是left-1则会发生数组访问越界错误。 AC Code
class NumArray {
public:vector<int> sum;NumArray(vector<…