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package leetcode._26_;

class Solution {

public int removeDuplicates(int[] nums) {

if (nums.length == 0) {

return 0;

}

int len = 1;

int emptyIndex = -1; // 可以放下一个元素的位置

for (int i = 0; i < nums.length - 1; i++) {

if (nums[i] == nums[i + 1] && emptyIndex == -1) {

emptyIndex = i + 1;

}

// if (i + 2 == nums.length && emptyIndex == -1){ // 表示全部不重复

// return nums.length;

// }

if (nums[i] != nums[i + 1]) {

len++;

if (emptyIndex!=-1) {

nums[emptyIndex++] = nums[i + 1];

}

}

}

return len;

}

}