CF1901F.Landscaping

普及/提高-

通过率:0%

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题目描述

You are appointed to a very important task: you are in charge of flattening one specific road.

The road can be represented as a polygonal line starting at (0,0)(0, 0) , ending at (n1,0)(n - 1, 0) and consisting of nn vertices (including starting and ending points). The coordinates of the ii -th vertex of the polyline are (i,ai)(i, a_i) .

"Flattening" road is equivalent to choosing some line segment from (0,y0)(0, y_0) to (n1,y1)(n - 1, y_1) such that all points of the polyline are below the chosen segment (or on the same height). Values y0y_0 and y1y_1 may be real.

You can imagine that the road has some dips and pits, and you start pouring pavement onto it until you make the road flat. Points 00 and n1n - 1 have infinitely high walls, so pavement doesn't fall out of segment [0,n1][0, n - 1] .

The cost of flattening the road is equal to the area between the chosen segment and the polyline. You want to minimize the cost, that's why the flattened road is not necessary horizontal.

But there is a problem: your data may be too old, so you sent a person to measure new heights. The person goes from 00 to n1n - 1 and sends you new heights bib_i of each vertex ii of the polyline.

Since measuring new heights may take a while, and you don't know when you'll be asked, calculate the minimum cost (and corresponding y0y_0 and y1y_1 ) to flatten the road after each new height bib_i you get.

输入格式

The first line contains a single integer nn ( 3n21053 \le n \le 2 \cdot 10^5 ) — the number of vertices of the polyline.

The second line contains nn integers a0,a1,,an1a_0, a_1, \dots, a_{n - 1} ( 0ai1090 \le a_i \le 10^9 ; a0=an1=0a_0 = a_{n - 1} = 0 ) — the heights of the corresponding vertices.

The third line contains nn integers b0,b1,,bn1b_0, b_1, \dots, b_{n - 1} ( 0bi1090 \le b_i \le 10^9 ; b0=bn1=0b_0 = b_{n - 1} = 0 ) — the new heights of the corresponding vertices.

输出格式

Print nn numbers: as the ii -th number ( 00 -indexed) print y0+y1y_0 + y_1 of the "best segment" (i. e. the sum of coordinates of the segment that gives the minimum cost) if you already know actual heights b0,,bib_0, \dots, b_i .

If there are several "best segments", print the minimum possible y0+y1y_0 + y_1 among them.

Your answer is considered correct if its absolute or relative error does not exceed 10910^{-9} .

Formally, let your answer be xx , and the jury's answer be yy . Your answer is accepted if and only if xymax(1,y)109\frac{|x - y|}{\max{(1, |y|)}} \le 10^{-9} .

输入输出样例

  • 输入#1

    5
    0 5 1 3 0
    0 1 3 2 0

    输出#1

    8.000000000000 4.000000000000 6.000000000000 6.000000000000 6.000000000000
  • 输入#2

    6
    0 4 1 3 3 0
    0 1 4 0 1 0

    输出#2

    7.000000000000 5.000000000000 7.500000000000 7.500000000000 6.666666666667 6.666666666667

说明/提示

The first answer in the first example is shown on the picture above.

You can achieve the second answer with the following "best segment":

You can achieve the third answer using the following "best segment":

You can achieve the fourth answer with the "best segment" shown below:

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