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 Java7 (OpenJDK 1.7.0) (judge verdict: Accepted)

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();
    int wrong =0,count =0;
    char [] number = new char[10];
    char c = '0';
    for (int i = 0; i <10 ; i++){
      number[i] = c++;
    }
    if (S.charAt(A) == '-') {
      for (int i=0; i<S.length(); i++) {
        for (int j=0; j<10; j++) {
          if (S.charAt(i) == number[j]) count++;
        }
      }
    }   
    if(count == S.length() -1) {
      System.out.println("Yes");
    } else {
      System.out.println("No");
    }
  }
}