#include<stdio.h>
#include<vector>
#include<algorithm>
#include<cmath>
#include<string>
#include<iostream>

int main(){
    int i, j;
    int a,b,c;
    std::vector<int> avec, bvec;
    for (i = 0; i <= 200; i++){
        scanf("%d %d", &a, &b);
        c = a + b;

        std::string str = std::to_string(c);
        std::cout << str.length() << "\n";
    }

    return 0;
}