P16 · 极值构型 · 经典问题 · 难

直角三角形内的散点分离 · n = 56

在直角边长为 1 的等腰直角三角形内放置 n 个点，使任意两点之间的最小欧氏距离尽可能大。

子题n = 56

目标最大化最小两点距离

纪录对比

最小两点距离 · 越大越好

纪录	数值 / 区间	作者 / 持有人	来源
外部已知最好	[0.112284259, 0.112284263]	Claudia Orquídea López Soto2011-02-26	Packomania ↗
本站纪录	0.112284262	matrixfang	纪录详情 ↓

在公布精度内匹配已知最好；不代表精确相等或已证明最优。

严格定义

容器直角边长为 1 的等腰直角三角形：直角顶点位于原点 (0, 0)，其余两个顶点为 (1, 0) 与 (0, 1)
提交恰好 n 个点 points，两两互不重合
约束每个点均位于三角形内部或边界上
分数δ(P) 为所有点对中的最小欧氏距离（验证器在内部通过精确比较距离平方 δ(P)² 来判定高低） $δ (P) = \min_{1 \leq i < j \leq n} ‖ p_{i} - p_{j} ‖$
目标最大化最小两两距离 δ(P)

挑战这个纪录 ↗

当前展示：本站纪录

1y0

1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556

0x1

已验证构造最近的一对点

帮助理解

顶点占位与等圆装箱等价性

与等圆装箱不同，散点可以直接落在三角形的三个顶点上（尤其是两个 45° 锐角顶点），等价于将容器向外膨胀 d/2 后的等腰直角三角形等圆装箱。在最优构型中，三个顶点通常会被优先占据，其余点沿三条边与内部接触图紧凑排布。

已知证明与文献对照

本题经膨胀换算后与等腰直角三角形内等圆装箱等价，相关外部构造与作者收录于 Packomania。其中 n = 4 已通过缩放 L 形区域的归约证明最优距离为 √2/2；其余规模的已知最优数值仅作参考基准，尚未证明最优性。

构型与历史

纪录详情

查看构型、求解笔记与纪录历史。

纪录保持者matrixfang

解题方式AI · OpenAI: GPT-6.1 Sol

挑战这个纪录 ↗提交证明 / 思路 ↓在讨论区分享最优性证明或关键界限思路，经审核采纳后可获证明分。

纪录保持者的求解笔记暂无求解笔记（点击展开）＋

纪录保持者暂未分享求解过程。

历史纪录（1 次易主）

matrixfangAI · OpenAI: GPT-6.1 Sol
0.09090909→0.112284262
2026-10-18

ANSWER FORMAT

答案怎么写

容器是直角边为 1 的等腰直角三角形，直角顶点在原点 (0, 0)，另两个顶点是 (1, 0) 与 (0, 1)。坐标直接写成小数，例如 "0.5"，最多九位小数。

提交点集坐标 points，每个坐标均以十进制字符串表示（如 "0.5"）。

当前第一名的答案

{
  "points": [
    [
      "0.002057342",
      "0.000000000"
    ],
    [
      "0.213412648",
      "0.000000000"
    ],
    [
      "0.325696911",
      "0.000000000"
    ],
    [
      "0.437981174",
      "0.000000000"
    ],
    [
      "0.550265437",
      "0.000000000"
    ],
    [
      "0.782406980",
      "0.000000000"
    ],
    [
      "1.000000000",
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      "0.664711790",
      "0.000556591"
    ],
    [
      "0.891203490",
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      "0.107734995",
      "0.037947190"
    ],
    [
      "0.381839043",
      "0.097241028"
    ],
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      "0.494123306",
      "0.097241024"
    ],
    [
      "0.606407569",
      "0.097241023"
    ],
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      "0.752446490",
      "0.108213329"
    ],
    [
      "0.193437052",
      "0.110493127"
    ],
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      "0.000000000",
      "0.112265413"
    ],
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      "0.863435253",
      "0.136564747"
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      "0.000000000",
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      "0.195494395",
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    ],
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      "0.196591066",
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    [
      "0.000000000",
      "0.673686729"
    ],
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    ],
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    ],
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      "0.220406342",
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    ],
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      "0.000000000",
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      "0.033994874",
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    ],
    [
      "0.000000000",
      "1.000000000"
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  ]
}

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": 56
}

当前第一名的答案

{
  "points": [
    [
      "0.002057342",
      "0.000000000"
    ],
    [
      "0.213412648",
      "0.000000000"
    ],
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      "0.325696911",
      "0.000000000"
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      "0.437981174",
      "0.000000000"
    ],
    [
      "0.550265437",
      "0.000000000"
    ],
    [
      "0.782406980",
      "0.000000000"
    ],
    [
      "1.000000000",
      "0.000000000"
    ],
    [
      "0.664711790",
      "0.000556591"
    ],
    [
      "0.891203490",
      "0.027768237"
    ],
    [
      "0.107734995",
      "0.037947190"
    ],
    [
      "0.381839043",
      "0.097241028"
    ],
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      "0.494123306",
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      "0.863435253",
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      "0.168407545"
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    ],
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    ],
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      "0.293957671",
      "0.276728336"
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      "0.097241024",
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      "0.295358675"
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      "0.389012599"
    ],
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      "0.097241024",
      "0.392976071"
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      "0.195494395",
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      "0.033994874",
      "0.892985496"
    ],
    [
      "0.000000000",
      "1.000000000"
    ]
  ]
}

提交点集坐标 points，每个坐标均以十进制字符串表示（如 "0.5"）。 · 验证器 v1.0.0

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