dump.java

    public static void main(String[] args) {
        int count = 0;
        int[] array = new int[]{0, 12, 56, 58, 100, 134, 180, 200}; // 添加头尾
        for (int i = 0; i < array.length; i++) {
            for (int j = i + 1; j < array.length; j++) {
                if (array[j] - array[i] > 50) {
                    if (i + 1 == j) {
                        System.out.println("-1"); // 跳不过去了
                        System.out.println("BAD At " + array[i] + " TO " + array[j]);
                        return;
                    } else {
                        System.out.println("JUMP At " + array[i] + " TO " + array[j-1]);
                        i = j - 1 -1; // 因为外循环还会加1
                        count++;
                        break;
                    }
                }
            }
        }
        System.out.println(count + 1);
    }