
import java.util.Scanner;

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();

        sc.close();

        String reg = "[0-9]+";

        if (s.substring(0, a).matches(reg)
                && s.substring(a, a + 1).equals("-")
                && s.substring(a + 1).matches(reg)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} import java.util.Scanner; Scanner 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();

        sc.close();

        String reg = "[0-9]+";

        if (s.substring(0, a).matches(reg)
                && s.substring(a, a + 1).equals("-")
                && s.substring(a + 1).matches(reg)) {
            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();

        sc.close();

        String reg = "[0-9]+";

        if (s.substring(0, a).matches(reg)
                && s.substring(a, a + 1).equals("-")
                && s.substring(a + 1).matches(reg)) {
            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();

        sc.close();

        String reg = "[0-9]+";

        if (s.substring(0, a).matches(reg)
                && s.substring(a, a + 1).equals("-")
                && s.substring(a + 1).matches(reg)) {
            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 sc.close() sc.close sc String reg = "[0-9]+"; reg "[0-9]+" if (s.substring(0, a).matches(reg)
                && s.substring(a, a + 1).equals("-")
                && s.substring(a + 1).matches(reg)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } s.substring(0, a).matches(reg)
                && s.substring(a, a + 1).equals("-")
                && s.substring(a + 1).matches(reg) s.substring(0, a).matches(reg)
                && s.substring(a, a + 1).equals("-")
                && s.substring(a + 1).matches(reg) s.substring(0, a).matches(reg) s.substring(0, a).matches s.substring(0, a) s.substring s 0 a reg s.substring(a, a + 1).equals("-") s.substring(a, a + 1).equals s.substring(a, a + 1) s.substring s a a + 1 a 1 "-" s.substring(a + 1).matches(reg) s.substring(a + 1).matches s.substring(a + 1) s.substring s a + 1 a 1 reg {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" String[] args args 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();

        sc.close();

        String reg = "[0-9]+";

        if (s.substring(0, a).matches(reg)
                && s.substring(a, a + 1).equals("-")
                && s.substring(a + 1).matches(reg)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} 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();

        sc.close();

        String reg = "[0-9]+";

        if (s.substring(0, a).matches(reg)
                && s.substring(a, a + 1).equals("-")
                && s.substring(a + 1).matches(reg)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main

import java.util.Scanner;

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();

        sc.close();

        String reg = "[0-9]+";

        if (s.substring(0, a).matches(reg)
                && s.substring(a, a + 1).equals("-")
                && s.substring(a + 1).matches(reg)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}
