Best Time to Buy and Sell Stock Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction (ie, buy one and sell one share of the stock), design an algorithm…

题目: Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may complete at most k transactions. Note: You may not engage in multiple transactions at the same time (i…

题目: Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may complete at most two transactions. Note: You may not engage in multiple transactions at the same time…

LeetCode:Best Time to Buy and Sell Stock Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction (ie, buy one and sell one share of the stock), design an a…

1.  String to Integer (atoi) Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input cases. Notes: It is inte…

Best Time to Buy and Sell Stock I 题目链接 题目要求: Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction (ie, buy one and sell one share of the stock), design…

题记:在求最大最小值的类似题目中,递推思想的奇妙之处,在于递推过程也就是比较求值的过程,从而做到一次遍历得到结果. LeetCode 上面的这三道题最能展现递推思想的美丽之处了. 题1 Best Time to Buy and Sell Stock Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complet…

Best Time to Buy and Sell Stock I 你只能一个操作:维修preMin拍摄前最少发生值 代码例如以下: int maxProfit(vector<int> &prices) { if (prices.size() == 0) return 0; int profit = 0; int preMin = prices[0]; for (int i = 1; i < prices.size(); i++) { if (prices[i] < pre…

Best Time to Buy and Sell Stock Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction (ie, buy one and sell one share of the stock), design an algorithm…

这三道题都是同一个背景下的变形:给定一个数组,数组里的值表示当日的股票价格,问你如何通过爱情买卖来发家致富? best time to buy and sell stock i: 最多允许买卖一次 best time to buy and sell stock ii: 不限制买卖次数 best time to buy and sell stock iii:最多允许买卖两次 对于i: 思路就是在第i个位置抛出时,希望在0~i-1个位置上的最低价买入,才能使得第i个位置的收益最大.然后比较所有可以抛…