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26删除有序数中的组重复项

Silence潇湘夜雨 2022-04-19 阅读 44
java
  1. 自己写的
 public int removeDuplicates(int[] nums) {
        int length = nums.length;
        if (length == 0){
            return 0;
        }
        int a = 1;
        for (int i = 1; i < length; i++) {
            if (nums[i] != nums[i-1]){
                nums[a] = nums[i];
                a++;
            }
        }
        return a;
    }
  1. LeetCode标答
class Solution {
    public int removeDuplicates(int[] nums) {
        int n = nums.length;
        if (n == 0) {
            return 0;
        }
        int fast = 1, slow = 1;
        while (fast < n) {
            if (nums[fast] != nums[fast - 1]) {
                nums[slow] = nums[fast];
                ++slow;
            }
            ++fast;
        }
        return slow;
    }
}

还是标答的双指针意思更明确

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