#include <iostream>
#include<math.h>
using namespace std;

int main() {
	float a,b,sum;
	int t=201;
	while(t--)
	{
		int cont=0;
		do
		{
		cin>>a;cin>>b;
		}while(a<0||a>1000000||b<0||b>1000000);
		sum=a+b;
		do
		{
			sum=sum/10;
			cont++;
		}while(floor(sqrt(sum))!=0);
		cout<<cont<<endl;
	}
	return 0;
}