PAT 乙级 1016

#include<iostream>using namespace std;int main(){string a,b;int Da,Db;int m1=1,m2=1;long long Pa=0,Pb=0;cin>>a>>Da>>b>>Db;for(int i=0;i<a.length();i++){if(a[i]-'0'==Da)  {  Pa+=Da*m1;  m1*=10;  }}for(int i=0;i<b.length();i++){if(b[i]-'0'==Db){Pb+=Db*m2;m2*=10;}}cout<<Pa+Pb<<endl;  return 0;}