正整数 A 的“DA（为 1 位整数）部分”定义为由 A 中所有 DA 组成的新整数 PA。例如：给定 A=3862767，DA=6，则 A 的“6 部分”PA 是 66，因为 A 中有 2 个 6。

现给定 A、DA、B、DB，请编写程序计算 PA+PB。

输入格式：

输入在一行中依次给出 A、DA、B、DB，中间以空格分隔，其中 0<A,B<1010。

输出格式：

在一行中输出 PA+PB 的值。

输入样例 1：

3862767 6 13530293 3

输出样例 1：

输入样例 2：

3862767 1 13530293 8

输出样例 2：

编程语言：Python

解题思想：

1.注意没有PA、PB的情况

时间复杂度：O(n)

代码如下：

A, DA, B, DB = input().split()
PA, PB = '', ''  # 存放结果
 
# 寻找PA、PB
for i in range(len(A)):
    if A[i] == DA:
        PA += DA
for i in range(len(B)):
    if B[i] == DB:
        PB += DB
 
# 判断PA、PB是否有值
if len(PA) == 0:  # 没有值则置为0
    PA = 0
else:
    PA = int(PA)
if len(PB) == 0:
    PB = 0
else:
    PB = int(PB)
 
print(PA + PB)

< >

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