力扣 26. 删除有序数组中的重复项

int removeDuplicates(int* nums, int numsSize)
{
    if (numsSize == 0) {
        return 0;
    }
    int fast = 1, slow = 1;
    while (fast < numsSize) {
        if (nums[fast] != nums[fast - 1]) {
            nums[slow] = nums[fast];
            ++slow;
            ++fast;
        }
        else
        {
            ++fast;
        }
    }
    return slow;
}