#include <bits/stdc++.h>
using namespace std;
int main() {
  long long a, b;
  cin >> a >> b;
  
  long long c = a+b;
  long long de = 0;
  long long ba = 1;
  while(c>0){
    de = de + (c%10) * ba;
    c = c/10;
    ba = ba*2;
  }
  cout << de << endl;
}