“删除重复项目” 的进阶:
如果重复最多被允许两次,又该怎么办呢?
例如:
给定排序数列 nums = [1,1,1,2,2,3]
你的函数应该返回长度为 5,nums 的前五个元素是 1, 1, 2, 2 和 3。
详见:https://leetcode.com/problems/remove-duplicates-from-sorted-array-ii/description/

Java实现:

class Solution {
public int removeDuplicates(int[] nums) {
int n=nums.length;
if(n<3){
return n;
}
int index=2;
for(int i=2;i<n;++i){
if(nums[i]!=nums[index-2]){
nums[index]=nums[i];
++index;
}
}
return index;
}
}

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