g0801_0900.s0859_buddy_strings

Class Solution

java.lang.Object

g0801_0900.s0859_buddy_strings.Solution

public class Solution
extends Object

859 - Buddy Strings.

Easy

Given two strings s and goal, return true if you can swap two letters in s so the result is equal to goal_, otherwise, return_ false_._

Swapping letters is defined as taking two indices i and j (0-indexed) such that i != j and swapping the characters at s[i] and s[j].

• For example, swapping at indices 0 and 2 in "abcd" results in "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.

Constraints:

• 1 <= s.length, goal.length <= 2 * 104
• s and goal consist of lowercase letters.

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
boolean	buddyStrings(String s, String goal)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

buddyStrings

public boolean buddyStrings(String s,
                            String goal)