LeetCode 35 Search Insert Position
题目来源:https://leetcode.com/problems/search-insert-position/description/
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.
Example 1:
Input: [1,3,5,6], 5
Output: 2
Example 2:
Input: [1,3,5,6], 2
Output: 1
Example 3:
Input: [1,3,5,6], 7
Output: 4
Example 4:
Input: [1,3,5,6], 0
Output: 0
public int searchInsert2(int[] nums, int target) {
int low=0;
int high=nums.length-1;
while(low<=high){
int mid=(low+high)/2;
if(nums[mid]==target)
return mid;
else if(nums[mid]<target)
low=mid+1;
else
high=mid-1;
}
return low; //使用二分查找方法实现。
}
public int searchInsert(int[] nums, int target) {
int n=nums.length;
for(int i=0;i<n-1;i++){
if(nums[i]==target)
return i;
if(target>nums[i]&&target<nums[i+1])
return i+1;
}
if(nums[n-1]==target)
return n-1;
else if(target<nums[0])
return 0;
else
return n; //方法1暴力法
}