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

public class Main {
	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str = br.readLine();
		String[] datasetstr = new String[2];
		int[] datasetint = new int[2];
		while (str != null) {
			datasetstr = str.split(" ", 2);
			datasetint[0] = Integer.parseInt(datasetstr[0]);
			datasetint[1] = Integer.parseInt(datasetstr[1]);
			System.out.println(Math.round(Math.ceil(Math.log10(datasetint[0]
					+ datasetint[1] + 1))));
			str = 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