#include <iostream>
using namespace std;

int main() {
    int first_day_coins;
    cin >> first_day_coins;
    int digit_sum = 0;
    int temp = first_day_coins;
    while (temp) {
        digit_sum += temp % 10;
        temp /= 10;
    }
    int total_coins = first_day_coins + digit_sum;
    cout << total_coins << endl;
    return 0;
}    
/**************************************************************
	Problem: 1617
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:2072 kb
****************************************************************/