import java.util.Scanner; //音乐研究--滑动窗口 public class Main { private int helper(int[] num1, int[] num2) { int sum = Integer.MAX_VALUE; int left = 0, right = num1.length - 1; while (right < num2.length) { if (right - left == num1.length) { sum = Math.min(sum(num1, num2, left, right),sum); left++; }e...