题解

#include<iostream>
using namespace std;
int main(){
    int a,b;
    cin>>a>>b;
    cout<<a<<b<<endl<<a+b;
    return 0;
}

#include<iostream>
#include<string>
using namespace std;
int main(){
    int a,b;
    cin>>a>>b;
    string s1=to_string(a),s2=to_string(b);
    cout<<s1+s2<<endl<<a+b;
    return 0;
}