import java.util.*;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int d = sc.nextInt();
        int m = sc.nextInt();

        int max = 0;
        for (int i = a; i <= b; i++) {
            for (int j = c; j <= d; j++) {
                int v = (i + j) % m;
                if (v > max)
                    max = v;
            }
        }
        System.out.println(max);
    }
}