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Remove Element

时间:2014-06-16 23:07:18      阅读:188      评论:0      收藏:0      [点我收藏+]

标签:leetcode   java   array   

题目

Given an array and a value, remove all instances of that value in place and return the new length.

The order of elements can be changed. It doesn‘t matter what you leave beyond the new length.

方法

使用左右两个标记。
    public int removeElement(int[] A, int elem) {
        if (A == null || A.length == 0) {
            return 0;
        }
        int len = A.length;
        int left = 0;
        int right = len - 1;
        while (left < right) {
            while (left < right && A[left] != elem) {
                left++;
            }
            while(left < right && A[right] == elem) {
                right--;
            }
            if (left < right) {
                int temp = A[left];
                A[left] = A[right];
                A[right] = temp;
            }
        }
        if (A[left] != elem) {
        	left = left + 1;
        }
        return left;
    }


Remove Element,布布扣,bubuko.com

Remove Element

标签:leetcode   java   array   

原文地址:http://blog.csdn.net/u010378705/article/details/31367085

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