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

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int k = sc.nextInt();
        Arrays.sort(a);
        for (int i = 0; i < k; i++) {
            a[2] *= 2;
        }
        System.out.println(a[0] + a[1] + a[2]);
        sc.close();
    }
} import java.util.Arrays; Arrays java.util import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int k = sc.nextInt();
        Arrays.sort(a);
        for (int i = 0; i < k; i++) {
            a[2] *= 2;
        }
        System.out.println(a[0] + a[1] + a[2]);
        sc.close();
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int k = sc.nextInt();
        Arrays.sort(a);
        for (int i = 0; i < k; i++) {
            a[2] *= 2;
        }
        System.out.println(a[0] + a[1] + a[2]);
        sc.close();
    } main {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int k = sc.nextInt();
        Arrays.sort(a);
        for (int i = 0; i < k; i++) {
            a[2] *= 2;
        }
        System.out.println(a[0] + a[1] + a[2]);
        sc.close();
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int[] a = new int[3]; a new int[3] 3 for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        } int i = 0; int i = 0; i 0 i < a.length i a.length a a.length i++ i++ i {
            a[i] = sc.nextInt();
        } {
            a[i] = sc.nextInt();
        } a[i] = sc.nextInt() a[i] a i sc.nextInt() sc.nextInt sc int k = sc.nextInt(); k sc.nextInt() sc.nextInt sc Arrays.sort(a) Arrays.sort Arrays a for (int i = 0; i < k; i++) {
            a[2] *= 2;
        } int i = 0; int i = 0; i 0 i < k i k i++ i++ i {
            a[2] *= 2;
        } {
            a[2] *= 2;
        } a[2] *= 2 a[2] a 2 2 System.out.println(a[0] + a[1] + a[2]) System.out.println System.out System System.out a[0] + a[1] + a[2] a[0] + a[1] + a[2] a[0] a 0 a[1] a 1 a[2] a 2 sc.close() sc.close sc String[] args args public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int k = sc.nextInt();
        Arrays.sort(a);
        for (int i = 0; i < k; i++) {
            a[2] *= 2;
        }
        System.out.println(a[0] + a[1] + a[2]);
        sc.close();
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int k = sc.nextInt();
        Arrays.sort(a);
        for (int i = 0; i < k; i++) {
            a[2] *= 2;
        }
        System.out.println(a[0] + a[1] + a[2]);
        sc.close();
    }
} Main
import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int[] a = new int[3];
        for (int i = 0; i < a.length; i++) {
            a[i] = sc.nextInt();
        }
        int k = sc.nextInt();
        Arrays.sort(a);
        for (int i = 0; i < k; i++) {
            a[2] *= 2;
        }
        System.out.println(a[0] + a[1] + a[2]);
        sc.close();
    }
}