#include<iostream>

using namespace std;

int main(){
	
	int i;

	int a,b,sum,figure;
	do{
		cin >> a[i] >> b[i];
	}while((a[i]<0||a[i]>100000)&&(b[i]<0||b[i]>100000));
	
	sum = a + b;

	
	figure = 1;
	while(sum[i]/10!=0){
		sum[i] = sum[i]/10;
		figure++;
	}
	cout << figure << "\n";
	
	return 0;
}