[PAT甲级]1009 Product of Polynomials （25 分)

题目

1009 Product of Polynomials （25 分)
This time, you are supposed to find A×B where A and B are two polynomials.

Input Specification:
Each input file contains one test case. Each case occupies 2 lines, and each line contains the information of a polynomial:

K N
​1
​​ a
​N
​1
​​
​​ N
​2
​​ a
​N
​2
​​
​​ ... N
​K
​​ a
​N
​K
​​
​​

where K is the number of nonzero terms in the polynomial, N
​i
​​ and a
​N
​i
​​
​​ (i=1,2,⋯,K) are the exponents and coefficients, respectively. It is given that 1≤K≤10, 0≤N
​K
​​ <⋯ ​2
​​ ​1
​​ ≤1000.

Output Specification:
For each test case you should output the product of A and B in one line, with the same format as the input. Notice that there must be NO extra space at the end of each line. Please be accurate up to 1 decimal place.

Sample Input:
2 1 2.4 0 3.2
2 2 1.5 1 0.5
Sample Output:
3 3 3.6 2 6.0 1 1.6

分析

这道题是一个多项式的乘法，利用map进行遍历即可，也可以使用数组的方法，注意系数为0的情况要被删除！
从这道题里面可以巩固一下map的遍历及自定义排序输出！

代码

#include
#include
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