Best time to buy and buy stock III

Source: Internet
Author: User
Best time to buy and buy stock III

Say you have an array for whichITh element is the price of a given stock on dayI.

Design an algorithm to find the maximum profit. You may complete at mostTwoTransactions.

 

C ++ version code:

class Solution {public:    int maxProfit(vector<int> &prices) {        int profit = 0, n = prices.size();        if( n==0 ) {            return 0;        }        int l[n], r[n];        memset(l, 0, sizeof(int)*n);        memset(r, 0, sizeof(int)*n);        int min = prices[0];        for(int i=1; i<n; i++) {            l[i] = prices[i] - min > l[i-1] ? prices[i] - min : l[i-1];            min = prices[i] < min ? prices[i] : min;        }        int max = prices[n-1];        for(int i=n-2; i>=0; i--) {            r[i] = max - prices[i] > r[i+1] ? max - prices[i] : r[i+1];            max = prices[i] > max ? prices[i] : max;        }        for (int i=0; i<n ;i++) {            profit = l[i] + r[i] > profit ? l[i] + r[i] : profit;        }        return profit;    }}; 

Java version code:

public class Solution {    public int maxProfit(int[] prices) {     if(prices == null || prices.length == 0) {         return 0;     }     int n = prices.length;     int[] left = new int[n];     int[] right = new int[n];     int min = prices[0];     for(int i=1; i<n; i++) {         left[i] = left[i - 1] > prices[i] - min ? left[i - 1] : prices[i] - min;           min = min < prices[i] ? min : prices[i];     }     int max = prices[n-1];     for(int i=n-2; i>0; i--) {         right[i] = right[i + 1] > max - prices[i] ? right[i + 1] : max - prices[i];          max = max > prices[i] ? max : prices[i];     }     int profit = 0;     for(int i=0; i<n; i++) {         profit = profit > left[i] + right[i] ? profit : left[i] + right[i];     }     return profit;    }}

  

Best time to buy and buy stock III

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.