{"trustable":false,"prependHtml":"\u003cscript\u003e window.katexOptions \u003d { disable: true }; \u003c/script\u003e\n\u003cscript type\u003d\"text/x-mathjax-config\"\u003e\n MathJax.Hub.Config({\n tex2jax: {\n inlineMath: [[\u0027$$$\u0027,\u0027$$$\u0027], [\u0027$\u0027,\u0027$\u0027]],\n displayMath: [[\u0027$$$$$$\u0027,\u0027$$$$$$\u0027], [\u0027$$\u0027,\u0027$$\u0027]]\n }\n });\n\u003c/script\u003e\n\u003cscript async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\" type\u003d\"text/javascript\"\u003e\u003c/script\u003e","sections":[{"title":"","value":{"format":"HTML","content":"\u003cscript type\u003d\u0027text/x-mathjax-config\u0027\u003eMathJax.Hub.Config({tex2jax: { inlineMath: [[\u0027$\u0027,\u0027$\u0027]] } }); \u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027 src\u003d\u0027https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config\u003dTeX-AMS-MML_HTMLorMML\u0027\u003e\u003c/script\u003e\n\u003cscript type\u003d\u0027text/javascript\u0027\u003esetTimeout(function(){MathJax.Hub.Queue([\u0027Typeset\u0027, MathJax.Hub, \u0027left_view\u0027]);}, 2000);\u003c/script\u003e\n\u003cdiv class\u003d\"panel_content\"\u003e\n 伊格买了土地的最后一周,但他不知道土地的面积,土地是由抛物线和直线封闭。下面的图片显示了这个区域。现在所有的交叉点显示在图片中,你可以告诉依纳爵的土地面积?\n \u003cbr\u003e \n \u003cbr\u003e注:图中的点P1是抛物线的顶点。\n \u003cbr\u003e \n \u003cbr\u003e \n \u003ccenter\u003e \n \u003cimg style\u003d\"max-width:100%;\" src\u003d\"CDN_BASE_URL/91dc24a066eaa3cddad6393bc62ad561?v\u003d1514247923\" SRC\u003d\"CDN_BASE_URL/91dc24a066eaa3cddad6393bc62ad561?v\u003d1514247923\"\u003e \n \u003c/center\u003e \n \u003cbr\u003e \n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"输入包含几个测试用例。输入的第一行是一个整数T,即测试用例的数量。t测试用例如下。\n\u003cbr\u003e每个测试用例包含三个交叉点,显示在图片中,他们在P1,P2,P3的命令。每个点用两个浮点数X和Y来描述。(0.0\u0026lt;\u003dX,Y\u0026lt;\u003d1000.0). \n\u003cbr\u003e"}},{"title":"Output","value":{"format":"HTML","content":"对于每个测试用例,您应该输出该区域的区域,结果应该舍入到小数点后2位。\n\u003cbr\u003e"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e2\n5.000000 5.000000\n0.000000 0.000000\n10.000000 0.000000\n10.000000 10.000000\n1.000000 1.000000\n14.000000 8.222222\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e33.33\n40.69\n \u003ci style\u003d\"font-size:1px\"\u003e \u003c/i\u003e\u003c/pre\u003e"}},{"title":"Hint","value":{"format":"HTML","content":"\u003cpre\u003e\n浮子可能不够准确,请用双浮子代替浮子。\n\n \n \u003c/pre\u003e"}}]}