Multiply And Add Two Numbers without any arithmetic operators

#include<bits/stdc++.h>
using namespace std;
#define ll long long
ll Add(ll a,ll b){

    while(b){
       ll carry=a&b;
       a=a^b;
       b=carry<<1;
    }
    return a;

}
ll Multiply(ll a,ll b){
    ll res=0;
    while(b){
        if(b&1){
           res=Add(res,a);
        }
        a<<=1;
        b>>=1;
    }
    return res;
}
int main(){

   ll x,y;
   cin>>x>>y;
   cout<<Multiply(x,y);

    return 0;
}