백준 #27110번 특식 배부

import java.util.Scanner;
public class Main {
	public static void main(String[] args) {
		
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		int a = sc.nextInt();
		int b = sc.nextInt();
		int c = sc.nextInt();
		int total = 0;
		
		if(a < n) {
			total += a;
		}else {
			total += n;
		}
		
		if(b < n) {
			total += b;
		}else {
			total += n;
		}
		
		if(c < n) {
			total += c;
		}else {
			total += n;
		}
		System.out.println(total);
		sc.close();
	}
}