#include <stdio.h>
using namespace std; 
int main() {
    int day1;
    scanf("%d", &day1);  
    int thou = day1 / 1000;   
    int hund = (day1 / 100) % 10;  
    int ten = (day1 / 10) % 10;    
    int unit = day1 % 10;      
    
    int day2 = thou + hund + ten + unit;  
    int total = day1 + day2;
    
    printf("%d", total);
    return 0;
}
/**************************************************************
	Problem: 1617
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:6 ms
	Memory:1144 kb
****************************************************************/