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P54 · 极值构型 · 经典问题 · 应用前沿 · 基线易突破

单位正方形内的最低星偏差 · n = 38

在单位正方形里放 n 个采样点。从原点量起、边平行于坐标轴的每一块矩形，占了多少面积，就该分到多少比例的点；你的分数，是所有这类矩形里最大的那个偏差。把它压到最低。

子题n = 38
目标最小化 最大误差 D*

严格定义

  • 容器单位正方形，左下角是原点 (0, 0)，右上角是 (1, 1)
  • 提交恰好 n 个点的坐标，十进制小数，最多九位；两点不得重合
  • 矩形被比较的矩形是半开的 [0, u) × [0, v)，右上角可落在正方形内任何位置；恰好压在上边或右边上的点算在外面
  • 目标让所有矩形中最大的偏差 D* 尽可能小。上确界在提交坐标的网格上取得，以整数精确计分
放大来摆，然后提交 ↗
1y0
0x1
已验证构造虚线框占 62.0% 的面积，照这个比例应该有 23.6 个点，实际有 38 个，差 0.3798，这就是分数

帮助理解

一个比喻：采样预算

把正方形当成一帧要渲染的画面，这 n 个点就是你全部的采样预算。哪块矩形分到的点比面积应得的多，是预算浪费在同一处；少了，是那块的细节被漏掉。

哪里有优化空间

格点和随机撒点都会在某些矩形上系统性偏置；低偏差构造（Hammersley、van der Corput）压得低得多。但对每个具体的 n，没人知道还能压到哪里。

前沿在哪里

n ≤ 21 的最优解已由 Clément、Doerr、Klamroth 与 Paquete 在 2025 年证明（Proc. Amer. Math. Soc. Ser. B 12: 78–90），所以本站从 n = 22 起；再往上，每一个 n 都是开放的。

当前第一名

0.379847645428532

最大误差 D*

纪录保持者创始基准
解题方式人工
挑战这个纪录 ↗
ANSWER FORMAT

答案怎么写

容器是边长 1 的正方形：左下角是原点 (0, 0)，右上角是 (1, 1)。被比较的矩形永远从原点量起，右上角可以落在正方形里的任何位置，所以一共有无穷多块矩形要同时满足，而不是某几块。坐标写成小数，例如 "0.25"，最多九位小数。

提交 points。每个坐标写成十进制字符串，例如 "0.25"，最多九位小数。榜上的数字是 D*，也就是所有矩形里最大的那个误差；分数越小越好。

当前第一名的答案

{
  "points": [
    [
      "0.010526316",
      "0.010526316"
    ],
    [
      "0.031578947",
      "0.410526316"
    ],
    [
      "0.052631579",
      "0.210526316"
    ],
    [
      "0.073684211",
      "0.610526316"
    ],
    [
      "0.094736842",
      "0.110526316"
    ],
    [
      "0.115789474",
      "0.510526316"
    ],
    [
      "0.136842105",
      "0.310526316"
    ],
    [
      "0.157894737",
      "0.710526316"
    ],
    [
      "0.178947368",
      "0.060526316"
    ],
    [
      "0.2",
      "0.460526316"
    ],
    [
      "0.221052632",
      "0.260526316"
    ],
    [
      "0.242105263",
      "0.660526316"
    ],
    [
      "0.263157895",
      "0.160526316"
    ],
    [
      "0.284210526",
      "0.560526316"
    ],
    [
      "0.305263158",
      "0.360526316"
    ],
    [
      "0.326315789",
      "0.760526316"
    ],
    [
      "0.347368421",
      "0.035526316"
    ],
    [
      "0.368421053",
      "0.435526316"
    ],
    [
      "0.389473684",
      "0.235526316"
    ],
    [
      "0.410526316",
      "0.635526316"
    ],
    [
      "0.431578947",
      "0.135526316"
    ],
    [
      "0.452631579",
      "0.535526316"
    ],
    [
      "0.473684211",
      "0.335526316"
    ],
    [
      "0.494736842",
      "0.735526316"
    ],
    [
      "0.515789474",
      "0.085526316"
    ],
    [
      "0.536842105",
      "0.485526316"
    ],
    [
      "0.557894737",
      "0.285526316"
    ],
    [
      "0.578947368",
      "0.685526316"
    ],
    [
      "0.6",
      "0.185526316"
    ],
    [
      "0.621052632",
      "0.585526316"
    ],
    [
      "0.642105263",
      "0.385526316"
    ],
    [
      "0.663157895",
      "0.785526316"
    ],
    [
      "0.684210526",
      "0.023026316"
    ],
    [
      "0.705263158",
      "0.423026316"
    ],
    [
      "0.726315789",
      "0.223026316"
    ],
    [
      "0.747368421",
      "0.623026316"
    ],
    [
      "0.768421053",
      "0.123026316"
    ],
    [
      "0.789473684",
      "0.523026316"
    ]
  ]
}
提交格式与技术细节需要编写程序或准备 JSON 答案时再查看＋

子题参数

{
  "n": 38
}

当前第一名的答案

{
  "points": [
    [
      "0.010526316",
      "0.010526316"
    ],
    [
      "0.031578947",
      "0.410526316"
    ],
    [
      "0.052631579",
      "0.210526316"
    ],
    [
      "0.073684211",
      "0.610526316"
    ],
    [
      "0.094736842",
      "0.110526316"
    ],
    [
      "0.115789474",
      "0.510526316"
    ],
    [
      "0.136842105",
      "0.310526316"
    ],
    [
      "0.157894737",
      "0.710526316"
    ],
    [
      "0.178947368",
      "0.060526316"
    ],
    [
      "0.2",
      "0.460526316"
    ],
    [
      "0.221052632",
      "0.260526316"
    ],
    [
      "0.242105263",
      "0.660526316"
    ],
    [
      "0.263157895",
      "0.160526316"
    ],
    [
      "0.284210526",
      "0.560526316"
    ],
    [
      "0.305263158",
      "0.360526316"
    ],
    [
      "0.326315789",
      "0.760526316"
    ],
    [
      "0.347368421",
      "0.035526316"
    ],
    [
      "0.368421053",
      "0.435526316"
    ],
    [
      "0.389473684",
      "0.235526316"
    ],
    [
      "0.410526316",
      "0.635526316"
    ],
    [
      "0.431578947",
      "0.135526316"
    ],
    [
      "0.452631579",
      "0.535526316"
    ],
    [
      "0.473684211",
      "0.335526316"
    ],
    [
      "0.494736842",
      "0.735526316"
    ],
    [
      "0.515789474",
      "0.085526316"
    ],
    [
      "0.536842105",
      "0.485526316"
    ],
    [
      "0.557894737",
      "0.285526316"
    ],
    [
      "0.578947368",
      "0.685526316"
    ],
    [
      "0.6",
      "0.185526316"
    ],
    [
      "0.621052632",
      "0.585526316"
    ],
    [
      "0.642105263",
      "0.385526316"
    ],
    [
      "0.663157895",
      "0.785526316"
    ],
    [
      "0.684210526",
      "0.023026316"
    ],
    [
      "0.705263158",
      "0.423026316"
    ],
    [
      "0.726315789",
      "0.223026316"
    ],
    [
      "0.747368421",
      "0.623026316"
    ],
    [
      "0.768421053",
      "0.123026316"
    ],
    [
      "0.789473684",
      "0.523026316"
    ]
  ]
}

提交 points。每个坐标写成十进制字符串，例如 "0.25"，最多九位小数。榜上的数字是 D*，也就是所有矩形里最大的那个误差；分数越小越好。 · 验证器 v1.0.0