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 Julia (1.4.0) (judge verdict: Wrong Answer)

#Postal Code
a,b=parse.(Int,split(readline()))
c=a+1
d=c+b
s = readline()
x = zeros(Int64,(1,d))
Ans=zeros(Int64,(1,d))
check=zeros(Int64,(1,d))
if s[c] == '-' 
    str = "Yes"
else 
    str="No"
end
for i=1:d
    if i != c && s[i] != '-' 
    x[i]=parse.(Int,string(s[i]))
    [(i != c && typeof(x[i])==Int64) ? Ans[i]=0 : Ans[i]=1] 
    Ans[c] = 0
    elseif i!=c && s[i] =='-' 
    Ans[d]=1
    end
end
if str=="Yes" && Ans == check
    println("Yes")
else
    println("No")
end