Problem:
Score : 200 points

Problem Statement

The postal code in Atcoder Kingdom is A+B+1 characters long, its (A+1)-th character is a hyphen -, and the other characters are digits from 0 through 9.

You are given a string S. Determine whether it follows the postal code format in Atcoder Kingdom.

Constraints

1≤A,B≤5

|S|=A+B+1

S consists of - and digits from 0 through 9.

Input

Input is given from Standard Input in the following format:

A B
S

Output

Print Yes if S follows the postal code format in AtCoder Kingdom; print No otherwise.

Sample Input 1

3 4
269-6650

Sample Output 1

Yes

The (A+1)-th character of S is -, and the other characters are digits from 0 through 9, so it follows the format.

Sample Input 2

1 1
---

Sample Output 2

No

S contains unnecessary -s other than the (A+1)-th character, so it does not follow the format.

Sample Input 3

1 2
7444

Sample Output 3

No

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

import java.lang.reflect.Array;
import java.util.*;


public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int a = sc.nextInt();
        int b = sc.nextInt();
        String s = sc.next();

        Character[] numbers = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
        List<Character> numList = Arrays.asList(numbers);
        String ans = "Yes";
        if(s.length() != (a + b + 1)){
            ans = "No";
        }
        for(int i = 0; i < s.length(); i++){
            char c = s.charAt(i);
            if(i == a){
                if(c != '-'){
                    ans = "No";
                }
                break;
            }else if(!numList.contains(c)){
                ans = "No";
                break;
            }
        }

        System.out.println(ans);
    }
}