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package leetcode.all.solution1_100;
/**
* 35. 搜索插入位置.
* 给定一个排序数组和一个目标值,在数组中找到目标值,并返回其索引。如果目标值不存在于数组中,返回它将会被按顺序插入的位置。
*
* 你可以假设数组中无重复元素。
*
* 示例 1:
* 输入: [1,3,5,6], 5
* 输出: 2
*
* 示例 2:
* 输入: [1,3,5,6], 2
* 输出: 1
*
* 示例 3:
* 输入: [1,3,5,6], 7
* 输出: 4
*
* 示例 4:
* 输入: [1,3,5,6], 0
* 输出: 0
*
* @author 刘壮飞
* https://github.com/zfman.
* https://blog.csdn.net/lzhuangfei.
*/
public class Solution35 {
public int searchInsert(int[] nums, int target) {
return binSearch(nums,0,nums.length-1,target);
}
/**
* 二分查找
* @param nums 数组
* @param low 低位
* @param high 高位
* @param value 待查找值
* @return 位置,未找到返回low
*/
public int binSearch(int[] nums,int low,int high,int value){
int middle=low+(high-low)/2;
if(low>high) return low;
if(value==nums[middle]) return middle;
else if(value<nums[middle]) return binSearch(nums,low,middle-1,value);
else return binSearch(nums,middle+1,high,value);
}
public static void main(String[] args) {
int[] nums = {
1, 3, 5, 6
};
int target = 0;
int r = new Solution35().searchInsert(nums, target);
System.out.println(r);
}
}
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