import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Solution sol = new Solution();

       
        int[] a = {3, 1, 1};
        int[] b = {6, 5, 4};

  
        int result = sol.minProductSum(a, b);

        System.out.println("Minimum Product Sum: " + result);
    }
}

class Solution {
    public int minProductSum(int[] a, int[] b) {
        Arrays.sort(a);
        Arrays.sort(b);
        
        int totalSum = 0;
        int n = a.length;
        
        for (int i = 0; i < n; i++) {
            totalSum += a[i] * b[n - 1 - i];
        }
        
        return totalSum;
    }
}