{"trustable":false,"sections":[{"title":"","value":{"format":"HTML","content":"\u003cp\u003e \u003cspan\u003e\u003ca href\u003d\"http://7xjob4.com1.z0.glb.clouddn.com/b3528d9f95c76b0290c7980f9b51c38e\"\u003e \u003cimg alt\u003d\"Download as PDF\" height\u003d\"26\" src\u003d\"http://uva.onlinejudge.org/components/com_onlinejudge/images/button_pdf.png\" title\u003d\"Download as PDF\" width\u003d\"100\"\u003e \u003c/a\u003e\u003c/span\u003e\u003c/p\u003e \n\u003cdiv\u003e\n \u0026nbsp;\n\u003c/div\u003e \n\u003cp\u003e \u003cspan\u003e平面上有n个点\u003c/span\u003e(n\u0026lt;\u003d1200),无三点共线,无两点重合,问任意三点组成的三角形内平均有几个点\u003c/p\u003e"}}]}