#include<iostream>
using namespace std;
int main()
{
int n,x,y;
cin>>n;
cin>>x>>y;
long long int max_x = x,max_y = y,min_x = x,min_y = y;
for(int i = 2; i <= n; i ++)
{
cin>>x>>y;
if(x>max_x)
max_x = x;
else if(x<min_x)
min_x = x;
if(y>max_y)
max_y = y;
if(y<min_y)
min_y = y;
}
cout << 4 * max(max_x-min_x,max_y-min_y) << endl;
return 0;
}
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