import java.util.Scanner;
public class Main {
 
    public static void main(String[] args) {
         
        Scanner sc=new Scanner(System.in);
        while(sc.hasNext()){ //??\??????????????????????????? ???????????£???????????????
        	int a=sc.nextInt();
        	int b=sc.nextInt();

        	int c=a+b;
        	int i = 1;
        	for(;;i++){
        		int d=c/10;
        		if(d==0)break;
        		c=d;
        
        	}
        	System.out.println(i); //?????????????????????
      
  
        } //???????????????????????£????????¨
    }
}
/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