Public Judge

pjudge

Total points: 7 Output Only

统计

这是一道提交答案题。

这是一道咋克在 IOI 2024 训练中大战了半个小时的题。

有一个矩形，被划分成了$n \times n$的格子，你要将其中涂黑其中一些格子，要求

涂黑的格子不能有公共边。
未涂黑的格子四连通。

问最多能涂黑多少格子。

实现细节

你不需要提交程序，你只需要提交你构造的答案。

本题共有 $7$ 个测试点，每个测试点 $1$ 分，共 $7$ 分。

输入格式

一个整数 $n$。

输出格式

$n$ 行，每行长度为 $n$ 的 $01$ 串，$1$ 表示涂黑，$0$ 表示未涂黑。

样例输入

样例输出

数据规模与约定

一共$7$个点，保证$n$依次等于$300,301,302,303,304,305,306$。

对于每个$n$，假设最优解黑色个数为$a_n$，你的答案为$b_n$。

$b_n=a_n$，你将获得$1$分。否则你获得 $0$ 分。

或者逐个上传：

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