{"trustable":false,"prependHtml":"\u003cstyle type\u003d\u0027text/css\u0027\u003e\n .input, .output {\n border: 1px solid #888888;\n }\n .output {\n margin-bottom: 1em;\n position: relative;\n top: -1px;\n }\n .output pre, .input pre {\n background-color: #EFEFEF;\n line-height: 1.25em;\n margin: 0;\n padding: 0.25em;\n }\n \u003c/style\u003e\n \u003clink rel\u003d\"stylesheet\" href\u003d\"//codeforces.org/s/96598/css/problem-statement.css\" type\u003d\"text/css\" /\u003e\n\u003cscript\u003e\n window.katexOptions \u003d {\n disable: true\n };\n\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 type\u003d\"text/javascript\" async src\u003d\"https://mathjax.codeforces.org/MathJax.js?config\u003dTeX-AMS_HTML-full\" /\u003e\n","sections":[{"title":"","value":{"format":"HTML","content":"在农村,一般家里都有一个看门狗。一般来说,看门狗都是拴在柱子上的,但是,在这道题目中,看门狗是拴在屋檐顶部的一个扣子上。\u003cbr\u003e\n当狗狗在扣子的正下方时,绳子多余了H米。并且知道狗狗的活动范围是以L为半径的圆。问房顶的高度是多少呢?"}},{"title":"Input","value":{"format":"HTML","content":"仅仅一行,两个整数,分别代表H和L(1\u003c\u003dH \u003c L\u003c\u003d1000000)。"}},{"title":"Output","value":{"format":"HTML","content":"一个数字,代表房顶的高度。\u003cbr\u003e\n假设标准答案是A,你的答案是B。你应该保证abs(A-B)/max(1,abs(B))\u003c\u003d1e-6。"}},{"title":"样例输入1","value":{"format":"HTML","content":"1 2"}},{"title":"样例输出1","value":{"format":"HTML","content":"1.5000000000000"}},{"title":"样例输入2","value":{"format":"HTML","content":"3 5"}},{"title":"样例输出2","value":{"format":"HTML","content":"2.6666666666667"}}]}