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 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include<stdio.h>
long long int small(long long int a, long long int b) {
	if (a >= b) {
		return b;
	}
	else {
		return a;
	}
}
int main() {
	long long int n, s[5000] = {},m,min=10000000,count=0,x;
	char str[3000];
	scanf("%lld%lld", &n,&m);
	scanf("%s",str);
	
	for (int i = 0; i < n; i++) {
		if (str[i]-'0'<0&& str[i] - '0' > 9) { printf("No"); return 0; }
	}
	if (str[n]!='-') { printf("No"); return 0; }
	for (int i = n+1; i < n+m+1; i++) {
		if (str[i] - '0' < 0 && str[i] - '0' > 9) { printf("No"); return 0; }
	}
	printf("Yes");
}