# 一元多项式的加法与乘法 一维数组实现，python def addDxs(a,b):     i = 0     j = 0     c = []     # for i in range(len(a)-1):     #     for j in range(len(b)):     while  i
     
      b[j+1]:                 c.append(a[i])                 c.append(a[i+1])                 i = i + 2             else:                 c.append(b[j])                 c.append(b[j+1])                 j = j + 2     while i<=len(a)-1:         c.append(a[i])         i=i+1     while j<=len(b)-1:         c.append(b[j])         j=j+1     return c def muldxs(a,b):#指数递降     i = 0     j = 0     d = []     e = []     if len(a)>0 and len(b)>0:         # for i in  range (0,len(a)-1,2):         #     for j in range(0,len(b)-1,2):         while i