zoukankan      html  css  js  c++  java
  • 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

    二分法:

    #include <iostream>
    using namespace std;
    int find2(int *a,int n,int num)
    {
        int low=0,high=n-1;
        while(low<=high)
        {
            int mid=(low+high)/2;
            if(a[mid]<num)
                low=mid+1;
            else if(a[mid]>num)
                high=mid-1;
            else
                return mid;
        }
        return low;
    }
    
    int main()
    {
        int a[]={1,3,5,6};
        int num=2,n=4;
        cout<<find2(a,n,num);
    }

     another

    class Solution {
    public:
        int searchInsert(int A[], int n, int target)
        {
           return find(A, 0, n, target);
        }
        int find(int A[], int start, int end, int target)
        {
            int p = end - start;
            if(p==1 || p==0)
            {
                if(A[start] >= target) return start;
                if(A[start] < target) return start+1;
            }
            int m = p / 2;
            if(A[start + m] == target)
                return start + m;
            if(A[start + m] > target)
                return find(A, start, start+m, target);
            else
                return find(A, start+m, end, target);
        }
    };
  • 相关阅读:
    各个控件说明
    html常用
    abp.message
    ABP框架——单表实体流程
    AngularJS $http和$.ajax
    AngularJS ng-if使用
    AngularJS 多级下拉框
    AngularJS 计时器
    AngularJS table循环数据
    Python之待学习记录
  • 原文地址:https://www.cnblogs.com/home123/p/7428717.html
Copyright © 2011-2022 走看看