{"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 yxt同学很喜欢画图,最近她买了一支智能画笔。由于刚刚买回来,她想测试一下智能画笔的性能。于是她就在平面直角坐标系中画出如下的这种规则的图形,并邀请她的同学们 算一算:给定的任意两点,连接两点的折线长度(即沿折线走的路线长度)是多少。 \n \u003cbr\u003e \n \u003cbr\u003e \n \u003ccenter\u003e \n \u003cimg style\u003d\"max-width:100%;\" SRC\u003d\"CDN_BASE_URL/b9adb1110ae8404ef5c5425e28c0b940?v\u003d1585319527\"\u003e \n \u003c/center\u003e \n \u003cbr\u003e \n \u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"第一个数是正整数N(≤100)。代表数据的组数。 \n\u003cbr\u003e每组数据由四个非负整数组成x1,y1,x2,y2;所有的数都不会大于100。 \n\u003cbr\u003e"}},{"title":"Output","value":{"format":"HTML","content":"对于每组数据,输出两点(x1, y1), (x2, y2)之间的折线距离。注意输出结果精确到小数点后3位。"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e5\n0 0 0 1\n0 0 1 0\n2 3 3 1\n99 99 9 9\n5 5 5 5\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e1.000\n2.414\n10.646\n54985.047\n0.000\u003c/pre\u003e"}}]}