import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int a = in.nextInt(); int b = in.nextInt(); String n = in.nextLine(); String str1 = in.nextLine(); String str2 = in.nextLine(); String[] strArray1 = str1.split(" "); String[] strArray2 = str2.split(" "); int[] intArray1 = new int[strArray1.length]; int[] intArray2 = new int[strArray2.length]; for(int i = 0 ; i < strArray1.length; i++){ intArray1[i] = Integer.parseInt(strArray1[i]); } for(int i = 0 ; i < strArray2.length; i++){ intArray2[i] = Integer.parseInt(strArray2[i]); } int res = 0; for(int i = 0; i < strArray1.length; i++){ res += Math.min(intArray1[i], intArray2[i]); } res = Math.min(res, b); System.out.println(res); } }