One Edit Distance
Given two strings s and t, return true if they are both one edit distance apart, otherwise return false.
A string s is said to be one distance apart from a string t if you can:
- Insert exactly one character into
sto gett. - Delete exactly one character from
sto gett. - Replace exactly one character of
swith a different character to gett.
Example 1:
Input: s = "ab", t = "acb"
Output: trueExplanation: We can insert 'c' into s to get t.
Example 2:
Input: s = "", t = ""
Output: falseExplanation: We cannot get t from s by only one step.
Constraints:
0 <= s.length, t.length <= 10^4sandtconsist of lowercase letters, uppercase letters, and digits.