CF641D.Little Artem and Random Variable

普及/提高-

通过率:0%

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题目描述

Little Artyom decided to study probability theory. He found a book with a lot of nice exercises and now wants you to help him with one of them.

Consider two dices. When thrown each dice shows some integer from 11 to nn inclusive. For each dice the probability of each outcome is given (of course, their sum is 11 ), and different dices may have different probability distributions.

We throw both dices simultaneously and then calculate values max(a,b)max(a,b) and min(a,b)min(a,b) , where aa is equal to the outcome of the first dice, while bb is equal to the outcome of the second dice. You don't know the probability distributions for particular values on each dice, but you know the probability distributions for max(a,b)max(a,b) and min(a,b)min(a,b) . That is, for each xx from 11 to nn you know the probability that max(a,b)max(a,b) would be equal to xx and the probability that min(a,b)min(a,b) would be equal to xx . Find any valid probability distribution for values on the dices. It's guaranteed that the input data is consistent, that is, at least one solution exists.

输入格式

First line contains the integer nn ( 1<=n<=1000001<=n<=100000 ) — the number of different values for both dices.

Second line contains an array consisting of nn real values with up to 8 digits after the decimal point — probability distribution for max(a,b)max(a,b) , the ii -th of these values equals to the probability that max(a,b)=imax(a,b)=i . It's guaranteed that the sum of these values for one dice is 11 . The third line contains the description of the distribution min(a,b)min(a,b) in the same format.

输出格式

Output two descriptions of the probability distribution for aa on the first line and for bb on the second line.

The answer will be considered correct if each value of max( a,ba,b ) and min( a,ba,b ) probability distribution values does not differ by more than 10610^{-6} from ones given in input. Also, probabilities should be non-negative and their sums should differ from 11 by no more than 10610^{-6} .

输入输出样例

  • 输入#1

    2
    0.25 0.75
    0.75 0.25
    

    输出#1

    0.5 0.5 
    0.5 0.5 
    
  • 输入#2

    3
    0.125 0.25 0.625
    0.625 0.25 0.125
    

    输出#2

    0.25 0.25 0.5 
    0.5 0.25 0.25 
    
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