import java.util.Scanner; public class Main02 { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String[] s = scanner.nextLine().split(" "); char[] x = s[0].toCharArray(); char[] y = s[1].toCharArray(); int sum=0; for (char x1 : x) { for (char y1 : y) { sum += (x1-'0') * (y1-'0'); } } System.out.println(sum); } }
import java.util.*; public class Main { public static void main(String[] args) { Scanner reader = new Scanner(System.in); while (reader.hasNext()) { int a = reader.nextInt(); int b = reader.nextInt(); ArrayList<Integer> arr = new ArrayList<>(); int sum = 0; while (a > 0) { arr.add(a%10); a = a / 10; } while (b > 0) { for (int i = 0; i < arr.size(); ++i) { sum += (b % 10 * arr.get(i)); } b /= 10; } System.out.println(sum); } } }