题解 | 买卖股票的最好时机(四)
买卖股票的最好时机(四)
https://www.nowcoder.com/practice/ba3c096c19e04afbbbd59250e909ac68
import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); // 注意 hasNext 和 hasNextLine 的区别 while (in.hasNextInt()) { // 注意 while 处理多个 case int a = in.nextInt(); int b = in.nextInt(); int[] prices = new int[a]; for (int i = 0; i < a; i++) { prices[i] = in.nextInt(); } int[][] data = new int[b+1][prices.length]; for (int i = 1; i <= b; i++) { int max = 0; for (int j = 0; j < prices.length; j++) { if (j == 0) { max = -prices[0]; data[i][0] = 0; } else { max = Math.max(max, data[i - 1][j - 1] - prices[j]); data[i][j] = Math.max(data[i][j - 1], prices[j] + max ); } } } System.out.println(data[b][prices.length - 1]); } } }