Problem:
Score : 200 points

Problem Statement

Takahashi has two positive integers A and B.

It is known that A plus B equals N.
Find the minimum possible value of "the sum of the digits of A" plus "the sum of the digits of B" (in base 10).

Constraints

2 ≤ N ≤ 10^5

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

Print the minimum possible value of "the sum of the digits of A" plus "the sum of the digits of B".

Sample Input 1

15

Sample Output 1

6

When A=2 and B=13, the sums of their digits are 2 and 4, which minimizes the value in question.

Sample Input 2

100000

Sample Output 2

10

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)

import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String[] s=sc.nextLine().split("");
		int[] X =new int[s.length];
		int cnt=0;
		for(int i=0;i<s.length;i++){
			X[i]=Integer.parseInt(s[i]);
			cnt=cnt+X[i];
			if(X[i]==0){
				if(X[i-1]==1)cnt=cnt+9;
			}
		}
		System.out.println(cnt);
	}
}