Problems
Interesting Sum
Interesting Sum
Given a three-digit positive integer $n$. Find the sum of the largest and the smallest three-digit numbers that can be formed from a permutation of $n$ numbers.
\InputFile
One integer $n~(100 \le n \le 999)$.
\OutputFile
Print the sum of the largest and the smallest three-digit number.
Input example #1
524
Output example #1
787