题解

#include <bits/stdc++.h>
using namespace std;
int main(){
string a,b,s1,s2="";
cin>>a>>b;
if(a>b)
s1=a+b;
else
s1=b+a;
for(int i=0;i<s1.size();i++)
if(i%2==1) s2+=s1[i];
cout<<s2<<endl;
return 0;
}