#include<iostream>
#include<cmath>
using namespace std;
  
int main()
{
    int num1, num2,sum;
    int n = 1;
    
    cin >> num1 >> num2;
  
    sum = num1 + num2;
  
    while (true)
    {
        
        int po = pow(10, n);
        if (!((sum % po) == sum))
            n++;
        else
            break;
    }
  
    cout << n << endl;
}