{"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 JK学长很喜欢爬山,恰巧今天天气晴朗,阳光明媚,JK学长便约上二三好友一起去爬山。由于这座山太高了,JK学长在爬到10000.0米的时候感觉非常累 。这是JK学长开始想:假如从k\u003d1开始计数,每步升高的高度为10000/k²米,我一共走n步能到达多高的高度h?JK学长真的很累很累,他不想自己计算,所以过来请你帮助他。\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"\u003cbr\u003e有多组测试用例,对于每组测试用例,只有一行输入,包含一个正整数n;\n\u003cbr\u003e"}},{"title":"Output","value":{"format":"HTML","content":"输出一个保留5位小数的数字 ——————JK学长能到达的高度h/10000的结果。"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e1\n2\n4\n8\n15\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e1.00000\n1.25000\n1.42361\n1.52742\n1.58044\u003c/pre\u003e"}},{"title":"","value":{"format":"HTML","content":"\u003cbr\u003e当输入1时,输出10000/10000\u003d1.00000\n\u003cbr\u003e当输入2时,输出(10000+10000/4)/10000 \u003d 1.00000+1/4\n\u003cbr\u003e当输入3时,输出(10000+10000/4+10000/9)/10000\u003d1.00000+1/4+1/9\n\u003cbr\u003e······以此类推;"}}]}