import java.io.*;

public class Main {
	public static void main(String args[]) throws IOException{
		String str,dataSet[];
		int i,j,total,count = 1;
		BufferedReader input =
				new BufferedReader(new InputStreamReader(System.in));
		while((str = input.readLine()) != null){
			dataSet = str.split(" ");
			i = Integer.parseInt(dataSet[0]);
			j = Integer.parseInt(dataSet[1]);
			total = i+j;
			while((total /= 10) >= 1){
				count++;
				//System.out.println("total = " + total);
			}
			System.out.println(count);
			count = 1;
		}
	}
}
/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