#include<iostream>
#include<algorithm>
using namespace std;

int main() {
	int a, b;
	cin >> a >> b;
	int sum = a + b;
	int i = 1;
	int count = 0;
	while (sum/i!=0){
		count++;
		i *= 10;
	}
	cout << count;
	return 0;
}
