100% correct Java 8 Solution

import java.io.; import java.util.;

public class Solution {

public static long find_min_actions(int[] cookies) {

    Arrays.sort(cookies);

    long sum = Long.MAX_VALUE;

    for(int base = 0; base < 3; base++) {
        int current_sum = 0;
        for(int i = 0; i < cookies.length; i++) {
            int delta = cookies[i] - cookies[0] + base;
            current_sum += (int)delta / 5 + delta % 5 / 2 + delta % 5 % 2 / 1;
        }
        sum = Math.min(current_sum,sum);
    }

    return sum;
}

public static void main(String[] args) {
    Scanner in = new Scanner(System.in);
    int n = in.nextInt();
    while(n-->0) {
        int m = in.nextInt();
        int cookies[] = new int[m];
        for(int cookie_i=0; cookie_i < m; cookie_i++){
            cookies[cookie_i] = in.nextInt();
        }
        System.out.println(find_min_actions(cookies));
    }


}

}