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 9.2.1) (judge verdict: Wrong Answer)

#include <bits/stdc++.h>
using namespace std;
int main(void){
    long long a,b,hantei = 0;
    cin >> a >> b;
    char s[a+b+1];
    cin >> s;
    for(long long i=0;i<a;i++){
        if(s[i] == '-'){
            hantei = 1;
            break;
        }
    }
    if(s[a] != '-') hantei = 1;
    for(long long i=a+1;i<b;i++){
        if(s[i] == '-'){
            hantei = 1;
            break;
        }
    }
    if(hantei == 0) cout << "Yes" << endl;
    else cout << "No" << endl;
}