#include <stdio.h>
int rever(int n)
{
    int m = 0;
    int t = 0;
    while (n != 0) {
        t = abs(n % 10);
        m = m * 10 + t;
        n /= 10;
    }
    return m;
}
int main() {
    int a, b;
    scanf("%d", &a);
    b=rever(a);
    printf("%d",a+b);


    return 0;
}