Score : 200 points
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.
-
and digits from 0
through 9
.Input is given from Standard Input in the following format:
A B S
Print Yes
if S follows the postal code format in AtCoder Kingdom; print No
otherwise.
3 4 269-6650
Yes
The (A+1)-th character of S is -
, and the other characters are digits from 0
through 9
, so it follows the format.
1 1 ---
No
S contains unnecessary -
s other than the (A+1)-th character, so it does not follow the format.
1 2 7444
No