#include <bits/stdc++.h>
using namespace std;
long long x,y,s,flag;
int main(){
	cin>>x>>y;
	while(1){
		if(x<y){
			s+=x*4;
			y-=x;
		}
		else if(x>y){
			s+=y*4;
			x-=y;
		}
		else if(flag==1){
			cout<<s+4;break;
		}
		else{
			cout<<x*4;break;
		}
		flag=1;
	}
	return 0;
}