#include <iostream>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <vector>
#include <algorithm>
#include <utility>
#include <queue>
int n,a,b;
using namespace std;
int main(){
	std::ios::sync_with_stdio(false);
	cin>>a>>b;
	n=a+b;
	int counter=0;
	while(n){
		n=n/10;
		counter++;
	}
	cout<<counter;
	return 0;
}