import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;


public class Main
{
	public static void main(String[] args) throws Exception
	{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		String line;
		while ((line = in.readLine()) != null)
		{
			StringTokenizer st = new StringTokenizer(line);
			int a = Integer.parseInt(st.nextToken()), b = Integer.parseInt(st.nextToken());
			int c = a+b;
			int cnt = 0;
			while (c > 0)
			{
				cnt++;
				c/=10;
			}
			System.out.println(cnt);
		}
	}
}
/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