Method countSubstrings

python/0647-palindromic-substrings.py:2–8

(self, s: str)

class Solution:
    def countSubstrings(self, s: str) -> int:
        res = 0

        for i in range(len(s)):
            res += self.countPali(s, i, i)
            res += self.countPali(s, i, i + 1)
        return res

    def countPali(self, s, l, r):
        res = 0