1002 A+B for Polynomials (PTA)

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​​ aN​1​​​​ N​2​​ aN​2​​​​ … NK​​ aNK​​​​

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

Output Specification:

For each test case you should output the sum 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 to 1 decimal place.

Sample Input:

2 1 2.4 0 3.2
2 2 1.5 1 0.5


Sample Output:

3 2 1.5 1 2.9 0 3.2

p1 = list(input().split())
p2 = list(input().split())
d1 = {}
d2 = {}
d3 = {}
k = []

for i in range(1,len(p1),2):
d1[int(p1[i])] = d1.get(int(p1[i]),float(p1[i+1]))
for i in range(1,len(p2),2):
d2[int(p2[i])] = d2.get(int(p2[i]),float(p2[i+1]))

d3 = d2.copy()
for k1 in d1:
temp = d3.get(k1,0) + d1.get(k1)
if (temp!=0):
d3[k1] = temp
else:
del d3[k1]

list1 = [str(len(d3))]

for i in sorted(d3.keys(),reverse = True):
list1.append(str(i))
list1.append(str(round(d3[i], 1)))
print(' '.join(list1))