import java.io.*;
import java.util.*;

public class Main {
	public static void main(String[] args) {
		try {
			BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
			String str;
			while (null != (str = in.readLine())) {
				String[] sar = str.split(" ");
				System.out.println(String.valueOf(Integer.parseInt(sar[0]) + Integer.parseInt(sar[1])).length());

			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}
/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