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 C (Clang 10.0.0) (judge verdict: Wrong Answer)

#include<stdio.h>
#include<string.h>
int main()
{
	int a,b;
	scanf("%d %d",&a,&b);
	char input[a+b+2];
	scanf("%s",input);
	int len = strlen(input);
	int count = 0;
	if(len == a+b+1)
	{
		for(int i = 0;i<len;i++)
		{
			if(input[i] == '-')
			{
				count++;
			}
		}
		if(count == 1) 
		{
			printf("Yes\n");
		}
		else{
			printf("No\n");
		}
	}
	else{
		printf("No\n");
	}
	return 0;
}