#include<bits/stdc++.h>
using namespace std;
long long x,y,ans=0;
int main() {
	cin>>x>>y;
	while(x!=0&&y!=0) {
		int newlen=min(x,y);
		if(x>y) {
			x-=y;
		}
		else{
			y-=x;	
		}
		ans+=newlen*4;
	}
	cout<<ans;
//先找出最大的长方形
//让减掉的边减去另一条边
	return 0;
}