import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

class Main {
	public static void main(String[] arg) throws NumberFormatException, IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int a, b;
		String line, str;
		String[] splitedLine;
		while ((line = br.readLine()) != null) {
			splitedLine = line.split(" ");
			a = Integer.parseInt(splitedLine[0]);
			b = Integer.parseInt(splitedLine[1]);
			str = String.valueOf(a + b);
			System.out.println(str.length());
		}
	}
}
/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