
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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();
		
		String s2 = s.substring(0, a);
		String s3 = s.substring(a, a + 1);
		String s4 = s.substring(a + 1);
		
		
 
        // 正規表現のパターンを作成
        Pattern p = Pattern.compile("^[0-9]+$");
        Matcher m = p.matcher(s2);
        Matcher m2 = p.matcher(s4);
 
        if (m.find() && s3.equals("-") && m2.find()) System.out.println("Yes");
        else System.out.println("No");
        
	}
} import java.util.Scanner; Scanner java.util import java.util.regex.Matcher; Matcher java.util.regex import java.util.regex.Pattern; Pattern java.util.regex 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();
		
		String s2 = s.substring(0, a);
		String s3 = s.substring(a, a + 1);
		String s4 = s.substring(a + 1);
		
		
 
        // 正規表現のパターンを作成
        Pattern p = Pattern.compile("^[0-9]+$");
        Matcher m = p.matcher(s2);
        Matcher m2 = p.matcher(s4);
 
        if (m.find() && s3.equals("-") && m2.find()) System.out.println("Yes");
        else System.out.println("No");
        
	}
} 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();
		
		String s2 = s.substring(0, a);
		String s3 = s.substring(a, a + 1);
		String s4 = s.substring(a + 1);
		
		
 
        // 正規表現のパターンを作成
        Pattern p = Pattern.compile("^[0-9]+$");
        Matcher m = p.matcher(s2);
        Matcher m2 = p.matcher(s4);
 
        if (m.find() && s3.equals("-") && m2.find()) System.out.println("Yes");
        else System.out.println("No");
        
	} main {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int b = sc.nextInt();
		String s = sc.next();
		
		String s2 = s.substring(0, a);
		String s3 = s.substring(a, a + 1);
		String s4 = s.substring(a + 1);
		
		
 
        // 正規表現のパターンを作成
        Pattern p = Pattern.compile("^[0-9]+$");
        Matcher m = p.matcher(s2);
        Matcher m2 = p.matcher(s4);
 
        if (m.find() && s3.equals("-") && m2.find()) System.out.println("Yes");
        else System.out.println("No");
        
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc String s = sc.next(); s sc.next() sc.next sc String s2 = s.substring(0, a); s2 s.substring(0, a) s.substring s 0 a String s3 = s.substring(a, a + 1); s3 s.substring(a, a + 1) s.substring s a a + 1 a 1 String s4 = s.substring(a + 1); s4 s.substring(a + 1) s.substring s a + 1 a 1 Pattern p = Pattern.compile("^[0-9]+$"); p Pattern.compile("^[0-9]+$") Pattern.compile Pattern "^[0-9]+$" Matcher m = p.matcher(s2); m p.matcher(s2) p.matcher p s2 Matcher m2 = p.matcher(s4); m2 p.matcher(s4) p.matcher p s4 if (m.find() && s3.equals("-") && m2.find()) System.out.println("Yes");
        else System.out.println("No"); m.find() && s3.equals("-") && m2.find() m.find() && s3.equals("-") && m2.find() m.find() m.find m s3.equals("-") s3.equals s3 "-" m2.find() m2.find m2 System.out.println("Yes") System.out.println System.out System System.out "Yes" System.out.println("No") System.out.println System.out System System.out "No" String args[] args

import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

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();
		
		String s2 = s.substring(0, a);
		String s3 = s.substring(a, a + 1);
		String s4 = s.substring(a + 1);
		
		
 
        // 正規表現のパターンを作成
        Pattern p = Pattern.compile("^[0-9]+$");
        Matcher m = p.matcher(s2);
        Matcher m2 = p.matcher(s4);
 
        if (m.find() && s3.equals("-") && m2.find()) System.out.println("Yes");
        else System.out.println("No");
        
	}
}