LeetCode:35. Search Insert Position(Easy)
1. 原题链接
https://leetcode.com/problems/search-insert-position/description/
2. 题目要求
给定一个已经排好序的数组和一个目标值,假设该数组中没有重复值,返回目标值在数组中的插入位置下标。
3. 解题思路
利用折半查找法定位插入的位置
4. 代码实现
1 public class SearchInsertPosition35 { 2 public static void main(String[] args) { 3 int[] nums = {1, 3, 5, 6}; 4 System.out.println(searchInsert(nums, 7)); 5 } 6 7 public static int searchInsert(int[] nums, int target) { 8 int left = 0, right = nums.length - 1; 9 while (left <= right) { 10 int mid = (left + right) / 2; 11 if (nums[mid] == target) return mid; 12 else if (nums[mid] > target) right = mid - 1; 13 else left = mid + 1; 14 } 15 return left; 16 } 17 }