Py||Large integer multiplication

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题目描述
A large integer is an integer that far exceeds the range of integer types represented by the Python language, such as 10 to the power of 100. Please calculate the multiply result of two large integers and output the last digit of the result.
输入
The input consists of multiple lines, two large integers m and n per line, with a range of -10^100< m, n <10^100.
输出
Output the last digit of the multiply result of each pair of large integers, then wrap.
样例输入 Copy
1000000000000 1111111111111111111111111111111111
333333333 6565787654309090111
样例输出 Copy
0
3

while True:
    s=[str(i) for i in input().split()]
    s1=[]
    s2=[]
    j=0
    s1=[s[0]]
    s2=[s[1]]
    a=len(s1[0])
    b=len(s2[0])
    j=1
    for i in s1[0]:
        if j==a:
            x=int(i)
        j=j+1
    k=1
    for i in s2[0]:
        if k==b:
            y=int(i)
        k=k+1
    print((x*y)%10)