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

public class Main
{
	public static void main(String[] args) throws NumberFormatException, IOException
	{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

		ArrayList<Integer> lstInt = new ArrayList<Integer>();
		String line = "";
		String[] strArray;
		int result = 0;
		int cnt = 0;

		while (cnt < 200 && (line = br.readLine()) != null)
		{
			strArray = line.split(" ", 0);
			result = Integer.parseInt(strArray[0]) + Integer.parseInt(strArray[1]);
			lstInt.add(Integer.toString(result).length());
			++cnt;
		}

		for (int digit : lstInt)
		{
			System.out.println(digit);
		}

	}
}
/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