题解 | 买卖股票的最好时机(一)

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);
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int a = in.nextInt();
            int[] data = new int[a];
            for (int i = 0; i < data.length; i++) {
                data[i] = in.nextInt();
            }
            int max = 0;
            int curr = 0;
            for (int i = 0; i < data.length; i++) {
                if (i == 0) {
                    curr = data[i];
                    continue;
                }
                if (data[i] > curr) {
                    if (data[i] - curr > max) {
                        max = data[i] - curr;
                    }
                }
                if (data[i] < curr) {
                    curr = data[i];
                }
            }
            System.out.println(max);
        }

    }
}