{"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 有一个长度为n的有序序列A,现在给你m组询问,每一组包含4个整数l1,r1,l2,r2,你需要取A[l1], A[l1+1] ... A[r1-1], A[r1] 和 A[l2], A[l2+1] ... A[r2-1], A[r2]这两段序列来组合成一个新的序列,然后输出这个序列的中位数;\n\u003c/div\u003e"}},{"title":"Input","value":{"format":"HTML","content":"第一行包含一个整数T,表示测试数据组数。每一组数据以一行n m开头,表示原始序列的长度和询问组数。接下来一行n个整数,表示原始序列A。接下来m组询问,每一组询问包含两行,第一行两个数字l1,r1 第二行两个数字l2,r2,意义如上,数据保证 l1\u003c\u003dr1 且 l2\u003c\u003dr2。\n\u003cbr\u003eT大概为200\n\u003cbr\u003e对于 90% 的数据, n, m \u003c\u003d 100\n\u003cbr\u003e对于 10% 的数据, n, m \u003c\u003d 100000\n\u003cbr\u003eA[i] 的范围在int以内"}},{"title":"Output","value":{"format":"HTML","content":"对于每组询问,输出一行,表示所构成新序列的中位数,答案要求精确到1位小数。"}},{"title":"Sample Input","value":{"format":"HTML","content":"\u003cpre\u003e1\n4 2\n1 2 3 4\n1 2\n2 4\n1 1\n2 2\u003c/pre\u003e"}},{"title":"Sample Output","value":{"format":"HTML","content":"\u003cpre\u003e2.0\n1.5\u003c/pre\u003e"}}]}