good

//高精加法献给你
#include <iostream>
#include <string>
#include <algorithm>

using namespace std;

string add(string num1, string num2) {
    int carry = 0;
    string result = "";
  
    if (num1.length() < num2.length()) {
        swap(num1, num2);
    }
  
    for (int i = num1.length() - 1, j = num2.length() - 1; i >= 0; i--, j--) {
        int digit1 = num1[i] - '0';
        int digit2 = j >= 0 ? num2[j] - '0' : 0;
  
        int sum = digit1 + digit2 + carry;
        carry = sum / 10;
        result = to_string(sum % 10) + result;
    }
  
    if (carry > 0) {
        result = to_string(carry) + result;
    }
  
    return result;
}

int main() {
    string num1, num2;
  
    cin >> num1 >> num2;
  
    string result = add(num1, num2);
  
    cout << result << endl;
  
    return 0;
}