
import java.util.Scanner;
import java.util.ArrayList;
class Main
{
	public static void main(String[] av)
	{
		Scanner sc  = new Scanner( System.in );
		ArrayList<Integer> al = new ArrayList<Integer>();

		while( sc.hasNextInt() )
		{
			int a = sc.nextInt();
			int b = sc.nextInt();
			int sum = a + b;
			int digit = String.valueOf(sum).length();	
			al.add( digit );
		}
		for ( Integer num : al )
		{
			System.out.println(num );
		}
	}
}
		
/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