LeetCode --- Remove Element
题意：给出长度为ｎ的数组，和整数elem， 要求删除数组中存在的elem，返回最终的数组长度。
附上代码：
1 class Solution {
2 public:
3 int removeElement(int A[], int n, int elem) {
4 // "front" and "back" keep trace of array A from the front
5 // and the back seperately
6 // "count" holds the number of "elem" in array A
7 int front = 0, back = n - 1, count = 0;
8 while (true) {
9 while (back >= 0 && A[back] == elem) {
10 count++;
11 back--;
12 }
13 while (front < n && A[front] != elem) front++;
14 if (front > back) break;
15 swap(A[front], A[back]);
16 count++;
17 front++, back--;
18 }
19 return n - count;
20 }
21 };
posted on 2014-06-08 21:05 Stomach_ache 阅读(154) 评论(0) 编辑 收藏 举报
