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

class Main
{
	public static void main(String[] args){
		java.io.BufferedReader br = new java.io.BufferedReader(new InputStreamReader(System.in));
		String line;
		StringTokenizer st;

		try{
			line = br.readLine();
			while(line != null){
				st = new StringTokenizer(line);
				int s = Integer.parseInt(st.nextToken()) + Integer.parseInt(st.nextToken());
				System.out.println((int)Math.log10(s) + 1);
				line = br.readLine();
			}
		}catch(IOException 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