Method delete

src/class129/Code04_FindNear.java:109–118

(int i)

	// 双向链表中删掉i位置
	public static void delete(int i) {
		int l = last[i];
		int r = next[i];
		if (l != 0) {
			next[l] = r;
		}
		if (r != 0) {
			last[r] = l;
		}
	}

	// 随机生成arr[1...n]确保没有重复数值
	// 为了测试