題目鏈接：https://pintia.cn/problem-sets/994805260223102976/problems/994805306310115328

題解：

 1 #include <iostream>
 2 #include<string>
 3 using namespace std;
 4 
 5 int main() {
 6     string A, B;
 7     int DA, DB;
 8     cin >> A >> DA >> B >> DB;
 9     int nDA = 0, nDB = 0;
10
 
     for (int i = 0; i < A.size(); i++)
11         if (A[i] - 48 == DA)
12             nDA++;
13     for (int i = 0; i < B.size(); i++)
14         if (B[i] - 48 == DB)
15             nDB++;
16 
17     int numA = 0, numB = 0, a = 1, b = 1;
18     for (int i = 0; i < nDA; i++) {
19         numA += a * DA;
 
20         a *= 10;
21     }
22     for (int i = 0; i < nDB; i++) {
23         numB += b * DB;
24         b *= 10;
25     }
26     cout << numA + numB;
27     return 0;
28 }

1016 部分A+B