#include <bits/stdc++.h>
using namespace std;
int main() {
// your code goes here
int n;
cin>>n;
int a[n],b[n],ans=0;
for(int i=0;i<n;i++)
{
cin>>a[i];
}
for(int i=0;i<n;i++)
{
cin>>b[i];
}
sort(a,a+n);
sort(b,b+n);
for(int i=0;i<n;i++)
{
ans+=a[i]*b[i];
}
cout<<ans<<endl;
return 0;
}
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