1.

#include
     
      using namespace std;int main(){    vector
      
        aa,bb,cc;    string a,b;    cin>>a>>b;    for(int i=a.size()-1; i>=0; i--) aa.push_back(a[i]-'0');    for(int i=b.size()-1; i>=0; i--) bb.push_back(b[i]-'0');    for(int i=0; i
       
        =0; i--)            cout<