2025-08-22 16:19:46 +0000 UTC

Existence of a Substring in a String and Its Reverse
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Code

class Solution:
    def isSubstringPresent(self, s: str) -> bool:
        for i in range(1, len(s)):
            cur, prev = s[i], s[i - 1]
            for j in range(i, len(s)):
                cur2, prev2 = s[j], s[j - 1]
                if cur == prev2 and prev == cur2:
                    return True
        return False