【leetcode刷提笔记】Search Insert Position

Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order.

You may assume no duplicates in the array.

Here are few examples.
[1,3,5,6], 5 → 2
[1,3,5,6], 2 → 1
[1,3,5,6], 7 → 4
[1,3,5,6], 0 → 0

JAVA版本：

 1 public int searchInsert(int[] A, int target) {
 2         int answer = 0;
 3         int front = 0;
 4         int end = A.length-1;
 5         while(front <= end){
 6             int mid = (front + end)/2;
 7             if(A[mid] == target)
 8                 return mid;
 9             if(A[mid] < target)
10                 front = mid + 1;
11             else
12                 end = mid-1;
13         }
14         return front;
15     }