[LeetCode]80. Remove Duplicates from Sorted Array II
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Problem Description
[https://leetcode.com/problems/remove-duplicates-from-sorted-array-ii/]
Follow up for “Remove Duplicates”:
What if duplicates are allowed at most twice?
For example,
Given sorted array nums = [1,1,1,2,2,3],
Your function should return length = 5, with the first five elements of nums being 1, 1, 2, 2 and 3. It doesn’t matter what you leave beyond the new length.
思路
俩指针,一个指向保存的数组的位置,一个指向原数组的位置。
Code
package q080;public class Solution { public int removeDuplicates(int[] nums) { int j = 0; for (int i = 0; i < nums.length; i++) { if (j < 2 || nums[i] > nums[j - 2]) { nums[j++] = nums[i]; } } return j; }}
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