数据结构 一元多项式的加法与乘法

# 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<len(a)-1 and  j<len(b)-1 :
            if a[i+1]==b[j+1]:
                if a[i]==-b[j]:
                    i=i+2
                    j=j+2

                else:
                    c.append(a[i]+b[j])
                    c.append(a[i+1])
                    i = i + 2
                    j = j + 2
            elif a[i+1]>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<len(a)-1:
            print("第", i, "外层循环，共", len(a)/2, "次循环")
            d=[]
            j = 0
            while j<len(b)-1:
                print("第", j, "内层循环，共", len(b)/2, "次循环")
                d.append(a[i]*b[j])
                d.append(a[i+1]+b[j+1])
                j=j+2
            e = addDxs(e,d)
            # del d
            i=i+2

    else:
         e.append(0)

    return e


# num = int(input())
# a = input('input a int:')
# a = a.split(' ')
#
# num1 = int(input())
# b = input('input b int:')
# b = b.split(' ')
a=[3,4,-5,2,6,1,-2,0]
b=[5,20,-7,4,3,1]
c=[]
# a=[]
# b=[5,24,-21,8,9,5]

print(a,b)

print(addDxs(a,b))

print(muldxs(a,b))