题解 | 小店的经营分析

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int len = in.nextInt();
        int[] b = new int[len];
        int[] tar = new int[len - 1 + len];
        int res = 0;
        for (int i = 0; i < len; i++){
            b[i] = in.nextInt();
        }

        int left = in.nextInt();
        int right = in.nextInt();

        for (int i = 0; i < len; i++){
            if (left <= b[i] && b[i] <= right){
                res += 1;
            }

            int sum = b[i];

            for (int j = i + 1; j < len; j++){
                sum += b[j];
                if (left <= sum && sum <= right){
                    res += 1;
                }
            }
        }
        System.out.println(res);
    }
}
a b c
遍历
a+b
a+b+c
b+c