真正成熟的创业机会，很少以情绪驱动为主要动员方式。越是强调“窗口期”“错过再等20年”，越说明其核心依赖的是心理紧迫感，而非确定性现金流。
var removeKdigits = function (num, k) {
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That looks something like this for a small grid where our snake is moving down. Notice that we delete and re-print 3 entire lines!
Cluster & Border Point Definition: The map is divided into clusters, and border points are identified using the Ford-Fulkerson based method.