为啥方案数会是127？

P2038 [NOIP2014 提高组] 无线网络发射器选址

就非常不理解。
by ZeroCore @ 2022-10-28 19:11:42

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请给出你的样例？
by Wf_yjqd @ 2022-10-28 19:25:20

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@[ZeroCore](/user/783555)
by Wf_yjqd @ 2022-10-28 19:25:47

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@[Wf_yjqd](/user/526094) 就是题目中的样例
by ZeroCore @ 2022-10-28 20:04:59

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显然ij错了 ```cpp t=a[i+d][i+d]-a[i-d-1][i+d]-a[i+d][i-d-1]+a[i-d-1][i-d-1];//计算poi=（i，j）时的场所数 ``` 自己看看
by Wf_yjqd @ 2022-10-28 20:28:55

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@[ZeroCore](/user/783555)
by Wf_yjqd @ 2022-10-28 20:29:09

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