#include <stdio.h>
int main(void){
    char score[10];
    int hit;
    int sum = 0;
    scanf( "%s", score );
    for( int i = 0; i < 9; i++ ){
        hit = (int)( score[i] - '0' );
        sum += ( hit <= 0 ) ? 10 : hit;
    }
    printf( "%d", sum );
}