PAT (Basic Level) 【乙级】1016 部分A+B

// 1016 部分 A+B

#include<iostream>
#include<algorithm>
using namespace std;

int main()
{
    
            
    long long int A, B, pa, pb,suma=0,sumb=0;
    cin >> A >> pa >> B >> pb;
    int ta = pa;
    while(A)
    {
    
    
        if (A % 10 == pa)
        {
    
    
            suma += ta;
            ta *= 10;
        }
        A /= 10;
    }
    int tb = pb;
    while(B)
    {
    
    
        if(B%10==pb)
        {
    
    
            sumb += tb;
            tb *= 10;
        }
        B /= 10;
    }
    cout << suma + sumb << endl;
    return 0;
}