import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
class Main{
    public static void main(String[] a) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String line = br.readLine();
		String strArray[];
		String str;
		while (line != null) {
			strArray = line.split(" ");
			str = String.valueOf(Integer.valueOf(strArray[0]) + Integer.valueOf(strArray[1]));
			char[] charArray = str.toCharArray();
			System.out.println(charArray.length);
			line = br.readLine();
		}
    }
}
/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