g1201_1300.s1202_smallest_string_with_swaps

Class Solution

java.lang.Object

g1201_1300.s1202_smallest_string_with_swaps.Solution

public class Solution
extends Object

1202 - Smallest String With Swaps.

Medium

You are given a string s, and an array of pairs of indices in the string pairs where pairs[i] = [a, b] indicates 2 indices(0-indexed) of the string.

You can swap the characters at any pair of indices in the given pairs any number of times.

Return the lexicographically smallest string that s can be changed to after using the swaps.

Example 1:

Input: s = “dcab”, pairs = [[0,3],[1,2]]

Output: “bacd” Explaination:

Swap s[0] and s[3], s = “bcad”

Swap s[1] and s[2], s = “bacd”

Example 2:

Input: s = “dcab”, pairs = [[0,3],[1,2],[0,2]]

Output: “abcd” Explaination:

Swap s[0] and s[3], s = “bcad”

Swap s[0] and s[2], s = “acbd”

Swap s[1] and s[2], s = “abcd”

Example 3:

Input: s = “cba”, pairs = [[0,1],[1,2]]

Output: “abc” Explaination:

Swap s[0] and s[1], s = “bca”

Swap s[1] and s[2], s = “bac”

Swap s[0] and s[1], s = “abc”

Constraints:

• 1 <= s.length <= 10^5
• 0 <= pairs.length <= 10^5
• 0 <= pairs[i][0], pairs[i][1] < s.length
• s only contains lower case English letters.

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
String	smallestStringWithSwaps(String s, List<List<Integer>> pairs)

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

smallestStringWithSwaps

public String smallestStringWithSwaps(String s,
                                      List<List<Integer>> pairs)