LT_0004_删除有序数组中的重复项

一、题目描述

二、代码实现

package com.it.leetcode;

public class Day_0001 {
    public static void main(String[] args) {
        int[] nums = {1,1,2};
        System.out.println(removeDuplicates(nums));
    }

    //快慢指针解法
    private static int removeDuplicates(int[] nums) {
        if (nums.length == 0) {
            return 0;
        }

        int last = 0;//慢指针
        int fast = 1;//快指针
        while (fast < nums.length) {
            if (nums[last] != nums[fast]) {
                nums[last + 1] = nums[fast];
                last++;
            }
            fast++;
        }
        return last + 1;
    }
}