#859

Buddy Strings

pupil · 550 · lc easy +28 · verified · 33.9% accepted · 3,349 likes · top 11%

Description

Given two strings s and goal, return true if you can swap exactly two characters in s to make it equal to goal, otherwise return false.

A swap selects two distinct indices i and j (i != j) and exchanges s[i] with s[j].

- For example, swapping indices 0 and 2 in "abcd" produces "cbad".

Example 1:

Input: s = "ab", goal = "ba"

Output: true

Explanation: You can swap s[0] = 'a' and s[1] = 'b' to get "ba", which is equal to goal.

Example 2:

Input: s = "ab", goal = "ab"

Output: false

Explanation: The only letters you can swap are s[0] = 'a' and s[1] = 'b', which results in "ba" != goal.

Example 3:

Input: s = "aa", goal = "aa"

Output: true

Explanation: You can swap s[0] = 'a' and s[1] = 'a' to get "aa", which is equal to goal.

Code

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class Solution:
    def buddyStrings(self, s: str, goal: str) -> bool:

class Solution:
    def buddyStrings(self, s: str, goal: str) -> bool: