import java.util.Scanner;

public class Main {

	/**
	 * Digit Number
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);

		while (scanner.hasNext()) {
			int a = scanner.nextInt();
			int b = scanner.nextInt();

			System.out.println(calcNumberDigit(a, b));
		}
	}

	private static int calcNumberDigit(int a, int b) {
		int target = a + b;
		int result = 1;
		int divide = 10;

		while (true) {
			if (target / divide < 1) {
				return result;
			}
			result++;
			divide *= 10;
		}
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz