rr地问：房子算面积sqft，包括garage么？# Living
r*7
1 楼
版上看到的面经，我怎么觉得好难啊
Given a 2D space of maximum size NxN which supports two operations :
[1] void UPDATE(x,y,v) - sets the value of cell [x,y] to v
[2] int QUERY(x1,y1,x2,y2) - returns sub-rectangle sum (x1,y1) to (x2,
y2)
inclusive, and there is an infinite stream of such 2 types of
operations which have to supported. How would you store the values for
efficient updates and retrievals ? （二维线段树 说算法+分析复杂度）
Given a 2D space of maximum size NxN which supports two operations :
[1] void UPDATE(x,y,v) - sets the value of cell [x,y] to v
[2] int QUERY(x1,y1,x2,y2) - returns sub-rectangle sum (x1,y1) to (x2,
y2)
inclusive, and there is an infinite stream of such 2 types of
operations which have to supported. How would you store the values for
efficient updates and retrievals ? （二维线段树 说算法+分析复杂度）
